Just watching dramas is definitely not enough, but if you want to learn a simple communication level, watching dramas + proper self-study is not a big problem, but if you want to reach the level of watching anime raw meat, you need at least N2 or above. This self-study will be very time-consuming.

It takes a lot of effort. If you really want to learn systematically, I suggest you sign up for a class and learn from the teacher. It will be much easier this way.

Also try not to learn Japanese by watching animations. You can practice listening, but there are many terms in animations that are not very standardized and are not suitable for use in daily life.

If you want to learn Japanese by watching dramas, first memorize the syllabary, and while memorizing it, look for dramas with bilingual subtitles. When watching dramas, remember to pay attention to the Japanese subtitles. If you encounter words you don't know, you can write them down, and occasionally take them out to review.

Improve vocabulary.

There are also grammar and other things that you can’t learn when studying Japanese comics. This is true. There are also kana, some pronunciation points of Japanese, etc.

If you want to practice listening, my method is to look at the raw meat first, guess the meaning while reading, and then look at the cooked meat again to confirm your guess and see where you guessed wrong.

If you have the energy, you can watch cooked meat again to consolidate your memory.

After practicing for a period of time, the listening improvement should be quite obvious.

The main thing is to let your ears get used to Japanese and get rid of the dependence on subtitles, and you will make a lot of progress. I am talking about the more time-consuming and laborious self-study method. Again, if you want to learn well, you should learn from the teacher. What else can you do?

Keep asking.