mihon no nootopasokon ha karukatta keredo, zissai ni tukaiyasui ka douka mo kakuninsitai.

見本 means sample, display model, or demo unit.
The particle の connects nouns, so 見本のノートパソコン means the sample laptop or the display-model laptop.

Here, の works like of or like an English noun used adjectivally:

• 見本のノートパソコン = the sample/demo laptop
• 日本の会社 = a Japanese company
• 学生の本 = a student’s book

So 見本の describes what kind of laptop it is.

は marks the topic of the sentence. The speaker is talking about the sample laptop and then making comments about it.

So the structure is roughly:

• 見本のノートパソコンは = as for the sample laptop...
• 軽かったけれど = it was light, but...
• 確認したい = I want to check...

Using は sets up the item being discussed, rather than simply marking it as the grammatical subject in a neutral way.

軽かった is the past tense of the い-adjective 軽い.

• 軽い = is light
• 軽かった = was light

This often happens when the speaker is referring to something they already experienced or checked. For example, they handled the sample laptop and found that it was light.

This does not always mean distant past in English. In Japanese, the past form is often used for an observed impression or completed experience.

For most い-adjectives, change the final い to かった.

• 軽い → 軽かった
• 高い → 高かった
• 使いやすい → 使いやすかった

Negative past would be:

• 軽くなかった = was not light

So 軽かった is a standard い-adjective past form.

けれど means but, though, or although. It connects two ideas with contrast.

Here the contrast is:

• the laptop was light
• but the speaker still wants to check whether it is actually easy to use

Compared with similar words:

• けれど / けど: very common, natural contrast
• が: also means but, often slightly more formal or written
• でも: often used more like however or to start a new sentence

So 軽かったけれど sounds very natural: It was light, but...

実際 means reality, actuality, or actual practice.
With に, it becomes adverbial: actually, in practice, for real, or in actual use.

So:

• 実際に使いやすい = easy to use in actual practice / actually easy to use

The に here is similar to how some nouns become adverb-like expressions:

• 具体的に = concretely
• 一般的に = generally
• 本当に = truly

In this sentence, 実際に emphasizes that the speaker wants to know not just how the laptop feels at first glance, but how usable it is in real use.

使いやすい means easy to use.

It is made from:

• 使う = to use
• verb stem 使い
• やすい = easy to do

So:

• 使う → 使い
  • やすい = 使いやすい

This pattern is very common:

• 読みやすい = easy to read
• 分かりやすい = easy to understand
• 書きやすい = easy to write with

It describes how easy it is to perform the action.

Both can be used, but かどうか explicitly means whether or not.

So:

• 使いやすいか = whether it is easy to use
• 使いやすいかどうか = whether or not it is easy to use

The version with どうか sounds a little fuller and clearer, especially in embedded questions before verbs like:

• 知る = to know
• 確認する = to confirm
• 覚えている = to remember

So 使いやすいかどうかも確認したい means I also want to confirm whether or not it is actually easy to use.

も means also or too.

It shows that this is an additional thing the speaker wants to check. The sentence implies something like:

• I already know the sample laptop was light,
• and I also want to confirm whether it is actually easy to use.

So かどうかも確認したい means I also want to confirm whether or not...

Without も, it would simply say I want to confirm whether or not...
With も, it adds the sense of in addition.

確認したい means want to confirm, want to check, or want to make sure.

It comes from:

• 確認する = to confirm / check
• 確認したい = want to confirm / check

It is similar to 確かめたい, but there is a nuance difference:

• 確認したい often sounds more objective, practical, or systematic
• 確かめたい can sound a bit more like personally making sure or verifying by trying

In this sentence, 確認したい fits well because the speaker is evaluating the laptop and wants to check another important point.

Japanese often omits the subject when it is understood from context.

Because the sentence ends with 確認したい (want to confirm), the speaker is normally talking about their own desire, so the implied subject is usually I.

So even though I is not stated, the sentence naturally means:

• I want to confirm...

This is extremely common in Japanese.

Japanese word order is flexible, but the current order is natural and easy to follow.

Basic flow:

1. 見本のノートパソコンは — topic
2. 軽かったけれど — first observation + contrast
3. 実際に使いやすいかどうかも — what still needs to be checked
4. 確認したい — main verb

This creates a very natural progression:

• The sample laptop was light,
• but
• I also want to check
• whether it is actually easy to use.

You could move some adverbial parts around, but this version sounds smooth and standard.

Not necessarily. In this sentence, 軽かった does not imply that it stopped being light.

It usually just means the speaker experienced it and found it light at that time. The main point is:

• being light is one positive point,
• but that alone is not enough,
• so the speaker still wants to check usability.

So the contrast is not it was light before, but now it isn’t.
The contrast is it was light, but I still need to confirm something else.