- simple boards can be made by first transferring your PCB design to a copper-plated board using toner transfer or UV exposure, then etching the rest of the cop

- simple boards can be made by first transferring your PCB design to a copper-plated board using toner transfer or UV exposure, then etching the rest of the copper away using an etchant solution (if you're willing; takes some elbow grease and dangerous chemicals). Or you can get a cheap fab-house to manufacture and ship you something (like 7-14 days, a few tens of bucks per batch) - simple boards you can probably solder with a cheapo (~50-100$) soldering system, or a solder-paste+hot air machine setup - components you can get for very cheap from LCSC, aliexpress or at okay prices but good reliability from digikey, mouser etc. You'll also need stuff like multimeter, ocsilloscope, logic analyzers, etc for debugging your boards but you'll know when you need them, and there are cheap-enough options available up to the point when you start doing advanced stuff and you know what you need.