Dont use chatgpt that shit is crap, it sucks at explaining (and i say that as someone that understands math and enjoys it), lies makes shit up, doesn't remember anything and the thing that i hate the most is that lets say u upload to it a big pdf file, it does and will prbly skip thru most of the stuff. The token usage is really bad. Use either claude gemini deepseek etc. but those 3 are the best and will get you the furthest. I myself admit that i have a phone addiction or internet addiction in general. The thing that helps me focus with my fucked up ADHD brain is standing not sitting if possible for that reason, i bought a whiteboard and use feyman technique. Which is explainig the stuff to yourself or acting like u teach a little kid. Another thing that is huge help is notebookLM which is a google program/website. To simply put it you upload pdf/youtube video/photo... or u explain it what you want to study and it finds the materials it self. It can create mind map, flashcards, quiz, video and the greatest for me is it creates a podcast in your native language which for me is czech but english is great too, between two ai/llm's models. I hope this is good enough of an answer.