After around 3000 hours of mostly self study I can understand 95+% of subtitles for TV shows and for a movie can follow enough dialog just through subtitles to understand what's going on at full speed. Study success scales pretty linearly with time spent as far as I can tell, assuming you have a fairly sensible study method. For 1000 hours study I'd imagine you'd get the basics of a lot of subtitles but probably not quickly enough to follow along at full speed.
Teachers can be helpful to point out some mistakes you'll miss through self study but unless you have a fair amount of cash to throw at the problem self study will likely be a better approach. For full fluency you probably want to target around 20k vocab, so it's a bit of a numbers game in terms of finding a quick way to improve your vocabulary. I use Skritter but I guess any SRS software should help a lot here.
Not entirely convinced by immersion as being necessary, I learned plenty of Chinese without it. Probably good for day to day vocab and motivation but unless your level is good you will still struggle to get into conversations where you use it, depending on how outgoing you are.
Teachers can be helpful to point out some mistakes you'll miss through self study but unless you have a fair amount of cash to throw at the problem self study will likely be a better approach. For full fluency you probably want to target around 20k vocab, so it's a bit of a numbers game in terms of finding a quick way to improve your vocabulary. I use Skritter but I guess any SRS software should help a lot here.
Not entirely convinced by immersion as being necessary, I learned plenty of Chinese without it. Probably good for day to day vocab and motivation but unless your level is good you will still struggle to get into conversations where you use it, depending on how outgoing you are.