Here are some notes I gathered while going through the TCM's Practical Bug Bounty Course. They are even more valuable you have the course you might not understand what is going on here so it's highly recommended you check it out before going over the notes and pieces that will be presented here.
NOTE: The practical lab sections might still be useful as they are indeed the labs and can be found publicly in pimpmykali repository (If you know what I am talking about you know)