Comment by colechristensen

Roughly in order

Beginner

* Get a Miniware TS101 USB C soldering iron, some solder, solder wick, flux

* Get a mediocre multimeter

* Do a little soldering assembly kit to learn how to solder, there are some good NASA manuals and videos to learn techniques and you won't need to do as good a job as they do

* Learn how to identify and replace broken capacitors

* Learn how to replace power and USB connectors

* ^ (a huge proportion of things that are fixable at all are going to be those two)

Intermediate

* Learn about static (ESD) safety, get the equipment and supplies to prevent frying things yourself

* Get an arduino or other low cost prototyping board and learn to program it and do little projects

* Find some broken consumer electronics with guides on https://www.ifixit.com/Guide and try to fix them, these things are often less about "electronics" and more about glue

* Read the parts of Zen and the Art of Motorcycle Maintenance about maintaining and fixing things

* Read https://www.eevblog.com and watch https://www.youtube.com/eevblog for information and inspiration

Advanced

* Get an oscilloscope and bench power supply, learn how to probe and analyze signals on boards

* Figure out yourself what next steps to pursue, you should be able to at this point, or at least to ask more specific questions