* 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
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