Can I become excellent in math?

Hey everyone, I am 19, took a gap year after highschool and thought I would never go to college because there wasn't anything that interested me, also I was always kind of lazy, but despite that I believe capable of learning. I had alright grades, probably never payed attention in class 90% of the time.

Anyway I got an idea and got really motivated recently, could I study mathematics? I would take the next 18 months to prepare and relearn everything, retake the exam on which I got a D without preparations and get an excellent mark. Get into a good college and get at least a bachelors degree and maybe masters, who knows.

I realised the real world sucks and I want to educate myself and have a high paying job, travel the world, possibly get a visa for UK or any other countries when I am all done, those are all the thigns that motivate me.

Despite the final exam, I did alright in math although I wasn't a genius. I am yet not sure if I am capable of locking in and doing this. I got this idea because despite not caring about it too much back then, I always thought math was kind of fun. Can I self study and get good in about a year? Like really good? I suppose the only downside of trying is I will end up in no math college, but end up still pretty good at math, maybe find a different college. I really wanna shoot high, that is why I chose STEM and maths.

Also for my country, Croatia, I will probably have to take another subject of choice exam, physics or computer science. I still have no clue what direction to go to excatly, but I like the idea of so many doors opening with math.

I am really asking for motivational support, reality checks or shared similar expirience. I have no doubt this will be a long and hard process.

Author: UnitedBuffalo4009