How many months it will take for full stack developer?

Answer 1

It can take many years. It can take up to 6 months to a year to become proficient at any language. Multiply that by the number of languages you intend to learn. It supposedly gets easier once you learn one language. So the amount of time may vary.

Answer 2

It depend on you, not each person are same.
If you spend more time per day and practice a lot you will learn faster, then someone who code once per week.
If you ask me, dont focus on time spend, focus on things you learn, just start and learn one by one thing, if you go to fast you will have gap in knowledge, dont go to learn new thing if you are not understanding something, it is much better to spend more time on some topic and do research and practice until you understand it.

And ofcourse build project with knowledge you have (if you have problem to find project what match your knowledge follow theOdinProject course, thay have a lot of project to build while learning)