Hi, I have completed my University's Calc 1-3 courses and I also have done some Linear Algebra and ODE's. I thought these were enough to start reading an Analysis book like Shilov's but I found the first part confusing like sets, metric spaces, etc. I was wondering what are the pre-requisites to learn analysis? Or maybe, are there other books that are simpler? Maybe something more introductory? I was leaning towards getting Yet Another Introduction to Analysis by Bryant or Introduction to Real Analysis by Schramm. Thanks.