Without knowing more about your background it's hard to be too specific. Some comments:
1. If you plan to actually broadcast anything - be sure you understand the rules related to broadcasting for your country or region.
2. Consider amateur radio as a pathway. ARRL and RSGB are good places to look for info on amateur radio. Many amateurs are just average people - many with limited education.
3. Start simple - an audio amplifier seems relevant. Much to be found via Google. Alternatively, many kits can be obtained at modest cost. Advantage of a kit is that it spares you the struggle of obtaining parts, PCB. Work backward and try to understand the design, capabilities, etc. Not the best way - but it's a way.
Good luck