KiCAD is excellent. You can use it to simulate circuits and play around consequence free as you learn. It has tools to go smoothly from schematic to simulation

KiCAD is excellent. You can use it to simulate circuits and play around consequence free as you learn. It has tools to go smoothly from schematic to simulation to PCB design including autorouting and checking netlists, which can be tedious and error prone to do by hand. As far as general resources "the art of electronics" by horrowitz and hill is still a gold standard for all-around electronics knowledge, and is written with good pedagogy.