For the most part you do not need expensive JBC tools or some super expensive testing tools.
If you plan to dive in, start simple with some USB soldering iron, multimeter and some cheap 20V labratory PSU. I found FNIRSI offers a USB-PD soldering iron with JBC tips for under $100 that is comparable to Weller 80W professional soldering station I got at work.
The other part is just trial and error. Try with simple electronics or guides. Get the general idea on how things work. Most of problems are already solved. It is easy to find repair guide for some old gaming tech or how to chip your consoles.
For the most part you do not need expensive JBC tools or some super expensive testing tools.
If you plan to dive in, start simple with some USB soldering iron, multimeter and some cheap 20V labratory PSU. I found FNIRSI offers a USB-PD soldering iron with JBC tips for under $100 that is comparable to Weller 80W professional soldering station I got at work.
The other part is just trial and error. Try with simple electronics or guides. Get the general idea on how things work. Most of problems are already solved. It is easy to find repair guide for some old gaming tech or how to chip your consoles.
Have fun!