Leemos la viñeta de la novela gráfica.

Leemos is the first person plural form of leer (to read) in the present indicative.

• yo leo = I read
• tú lees = you read
• él/ella lee = he/she reads
• nosotros/nosotras leemos = we read
• vosotros/vosotras leéis = you all read
• ellos/ellas leen = they read

So leemos means we read.

Yes. In Spanish, the simple present often covers both:

• we read
• we are reading

So Leemos la viñeta de la novela gráfica can mean either, depending on context.

If you want to be more explicit about right now, Spanish can also use:

• Estamos leyendo la viñeta de la novela gráfica = We are reading the panel/frame of the graphic novel

But the original sentence is completely natural.

Because Spanish often drops subject pronouns when the verb already makes the subject clear.

Here, leemos already tells you the subject is we. So:

• Leemos la viñeta... = normal and natural
• Nosotros leemos la viñeta... = also possible, but adds emphasis or contrast

For example:

• Nosotros leemos la viñeta, pero ellos leen el texto completo.
  We read the panel, but they read the full text.

In this context, viñeta usually means a panel, frame, or cartoon panel in a comic or graphic novel.

In Spanish, viñeta can have a few related meanings depending on context, such as:

• a comic panel
• a cartoon
• a short descriptive vignette

With novela gráfica, the most likely meaning is panel or frame.

Spanish very often uses de to show relationships that English might express in several ways.

So:

• la viñeta de la novela gráfica = the panel of the graphic novel / the panel from the graphic novel

This is a very normal Spanish structure.

Spanish uses de a lot where English might prefer:

• possession
• origin
• type
• description

Examples:

• el final de la película = the ending of the film
• la portada del libro = the cover of the book
• una escena de la obra = a scene from the play

Because both viñeta and novela gráfica are feminine singular nouns, so they take la.

• la viñeta
• la novela gráfica

Also, Spanish often uses definite articles more naturally than English does.

So even if English might sometimes say:

• We read a panel from a graphic novel
• We read the panel from the graphic novel

Spanish may use the article in places that feel more frequent or more natural than in English.

In Spanish, adjectives usually come after the noun.

So:

• novela gráfica = graphic novel
• literally, novel graphic

This is the normal order in Spanish.
Also, novela gráfica is a fixed, standard expression for graphic novel.

Gráfica is an adjective describing novela.

Both words are feminine singular, so they agree:

• novela = feminine singular noun
• gráfica = feminine singular adjective

That agreement is required in Spanish.

Compare:

• libro gráfico = graphic book
• novela gráfica = graphic novel
• historietas gráficas = graphic stories/comics

No. De + el contracts to del, but de + la stays de la.

So:

• de + el libro → del libro
• de + la novela → de la novela

That is why the sentence has:

• de la novela gráfica

not dela or anything else.

Viñeta is pronounced roughly like vee-NYEH-ta.

The letter ñ is pronounced like the ny sound in canyon.

So:

• ñ ≈ ny

And gráfica is roughly GRA-fi-ka, with the stress on the first syllable because of the written accent: grá.

Because the accent mark shows where the stress goes when it does not follow the default stress rules.

• novela naturally stresses the second-to-last syllable: no-VE-la
• gráfica would not naturally be stressed on grá without the accent mark, so the written accent is needed: GRÁ-fi-ca

So the accent mark tells you the stress clearly.

Yes, it sounds natural.

A speaker in Spain would understand it without any problem. The only thing that depends on context is whether viñeta means:

• a specific panel in the graphic novel
• or possibly a cartoon image / illustrated section

In a classroom, book, or reading activity, this sentence is perfectly normal.