> I find it really hard to read anything because of the math notations and zero explanation of it in the context. So many answers and no correct one yet. Read

> I find it really hard to read anything because of the math notations and zero explanation of it in the context. So many answers and no correct one yet. Read and solve "How to Prove It: A Structured Approach", Velleman. This is the best introduction I've seen so far. After finishing you'll have enough maturity to read pretty much any math book.