If I were you, I'd start here (free book on the basics of math without which it's very easy to drown in the so called proof-based math): http://www.people.vcu.edu/~rhammack/BookOfProof/
If I were you, I'd start here (free book on the basics of math without which it's very easy to drown in the so called proof-based math): http://www.people.vcu.edu/~rhammack/BookOfProof/