"I want to live well."
Translation:Я хочу жить хорошо.
It is probably better in this sentence to put it at the end, because that emphasizes it; you obviously want to live, but you're telling the other person how you want to live: well.
Хорошо́ 'well' is indeed an adverb. However, the corresponding adjective is хоро́ший (fem. хоро́шая, neut. хоро́шее) 'good'.
До́брый (fem. до́брая, neut. до́брое) can mean 'good' in some contexts, but its usual meaning is 'kind'.
Да, ты можешь. Literally every master of anything started out just as clueless and overwhelmed to the point where it feels impossible. The only difference is they stuck with it. You have to force yourself to study a LITTLE bit each day, doesn't even have to be 30 minutes as long as you're getting exposed to it on a daily basis. Those short, daily sessions are far better than studying all day / night once in a while, with nothing in between.
You need to install a Cyrillic keyboard on your computer or on your phone, it is not that hard.
On the computer, it would be easier using a virtual keyboard on the screen, that any Windows computer already has.
And you just have to learn how to change from Latin keyboard to Cyrillic, and vice versa. There easy ways to do so on each device.