Find yourself a supply of broken appliances, perhaps at a Goodwill-like store or an online marketplace and get started finding that broken sprocket or stretched belt or bad capacitor.
It’s ridiculously satisfying taking something that’s destined for the landfill and making it live again.
Oh and YouTube. Lots of YouTube. There’s a video for how to troubleshoot and fix just about everything. YouTube has helped me fix a broken stand mixer, dishwasher, dryer, small fission reactor, computer keyboard, sewing machine, ceiling fan, ice maker, and many I’m surely forgetting. And I’m just a clueless web dev!