For anyone looking to get into D&D 3.5e, here's a handy rule sheet that I made when I started DMing (be sure to read my comment if you want to use this). :
Giant in the Playground Forums
An Optimizers' Tier List. Simple and Single-Classed this time. : r/3d6
Basic Rules for Dungeons and Dragons (D&D) Fifth Edition (5e) - D&D Beyond