If you were rated 1300 when you were 12 you didn't start at 18 I actually started at 18 (play chess often that is, reading out of books here and there, tactics puzzles). My first tournament I was 21.
Well... I'm not a master though, so it's not a happy ending lol. But FWIW I would guess it's more possible for you than me because starting young gave you more than nothing. Also, even though IQ isn't really relevant to chess, if that's a real IQ score (not internet stuff) you're not a stupid person, and IMO anyway, it's possible for many adult beginners to make master if they work hard.
And don't take this the wrong way but, you're barely an adult, so don't feel too old haha. There are topics like this where people are asking how good they can be starting at 40, 50, 60 etc.
I think you can be rated 2000 in 4 years, sure. But, IMO anyway, it would take more than 1-2 hours a day. I think one big consideration is working in tournaments. As a college student I don't know how available your weekends and cash for entry fees are. It's not a deal breaker, but if you can try to work in tournaments. And as I said I do think master is a realistic goal.
I played chess in tournaments between the ages of 8 and 12, but then at 12 I quit chess and didn't start back up again until now, at 18. I never got very good, my peak rating was only around 1300.
I've heard a lot of people say that if you don't start playing at a young age, it's nearly impossible to reach master level, and improving is incredibly difficult. Would it be possible to reach expert (2000+) level within, say, 4 years, at my age? I have a pretty high IQ, around 140ish, and when I was younger I had a lot of natural ability (without any training I was able to reach a rating of around 1100 when I was 8).
So do you think this is a possible goal? Even though I'm in college, I have quite a bit of free time, enough for about 1-2 hours of chess a day. In the past month alone, I've been able to improve my standard rating from about 1250 to 1350 by studying chess mentor, tactics, and videos.
Thanks.