My advice would be try not to burn yourself out on it. Learning a language isn't easy and It's a pretty long process. So don't go all out straight away cause most of the time that will burn you out. Just try and get into the habit of studying bit by bit and slowly work your way up from there, that would be best in my opinion.
Oh and if you have the money maybe go to something like a language school, cause it doesn't hurt having someone you can ask in person for help. It's also a good way of making sure that you at least have a definite time when you study the language.
It also doesn't hurt to have a specific goal in mind like something to work towards for example maybe there is an untranslated vn that you really want to play, maybe you could make it your goal so that if you ever lose faith you can look at that and remember why you are doing this.
And make sure to have fun while doing it. Hope it goes well for you. I am rooting for you!