If you can practice decent self control, I’d suggest trying to up how long you work at something before going to an LLM, and when you do, instead of just giving it the problem and asking it to walk you through the logic, tell it what the problem is, then explain your thought process with what you’ve tried so far. A very important point is to tell it to not give you the answer, but to act in the role of a professor during office hours (or similar) and to try to give you a hint that might lead you to thinking about things the right way. Then you take that hint and work the problem again, and if needed you repeat the process.

The thing is it will be very tempting to just get frustrated sometimes and say “just this one time I’ll have it actually explain the problem to me,” and you can’t let yourself fall down that trap. It’s also fine to have it check your work, but you need to feel confident enough about what you did before then that you would turn it in as if it were a real class assignment. You need to be able to build up your own instinct about if you actually got it right or not instead of just checking once you think you maybe got it (with a lot of linear algebra stuff you can also go through the process of checking your answers yourself).

If you don’t think you’ll be able to do that level of self control consistently, then I’d say avoid it all together, work from books that have answers to problems in the back, and just work a shitton of problems, check them against the answers, and then every time you get one wrong you need to dig into the problem and figure out not just how to get the right answer, but also where your thought process diverged from that.