cheoeumeneun mangseoryeossjiman jigeumeun gateun uigyeoniya, geuraeseo donguihae.

Both can mean “now,” but:

• 지금은 focuses on the current time point.
• 이제는 adds the sense of “from now (on)/by now,” often implying a change has just taken effect. In this sentence, either works; 이제는 can slightly emphasize the shift more emotionally.

Literally “(I have) the same opinion.” Korean often omits the reference when it’s obvious from context. If you want to make it explicit:

• 너랑 의견이 같아. (My opinion is the same as yours.)
• 네 의견에 동의해. (I agree with your opinion.)
• 나도 같은 의견이야. (I’m of the same opinion too.)

Yes, it’s natural. Other common ways:

• 의견이 같아.
• 같은 생각이야. (a bit more casual)
• 나도 그래. / 맞아. (very conversational)

The sentence is in casual speech (반말):

• Casual: 의견이야
• Polite: 의견이에요
• Formal: 의견입니다 Also note the copula rule:
• After a consonant-ending noun: 이야/이에요/입니다 (e.g., 의견이야)
• After a vowel-ending noun: 야/예요/입니다 (e.g., 친구야, 친구예요)

Standard patterns:

• Agree to/with something: N에 동의하다 (e.g., 그 제안에 동의해)
• Agree with someone: N에게/한테 동의하다 (less common than the “something” pattern, but used)
• You’ll also hear N에 대해 동의하다 (“agree about/regarding N”) and even N을 동의하다 in casual speech, but N에 동의하다 is the safest.

Yes. Korean writing often uses either:

• …, 그래서 … (same sentence with a comma), or
• … 그래서 … / …. 그래서 … (start a new sentence). All are acceptable stylistically.

Subjects are often dropped when obvious. Here it’s “I.” To include it:

• Casual: 나는 처음에는 망설였지만 지금은 같은 의견이야, 그래서 동의해.
• Polite: 저는 처음에는 망설였지만 지금은 같은 의견이에요, 그래서 동의해요.

Yes. You can integrate the reason into one clause:

• 지금은 의견이 같아서 동의해. (Since our opinions are the same, I agree.) This is slightly tighter and very natural.

Inside words, 의 is usually pronounced [의]. So:

• 의견 ≈ [의견]
• 동의해 ≈ [동의해] As the possessive particle 의 (e.g., 한국의), it’s often pronounced [에] in casual speech, but that’s not the case here.