I bought an MSI gaming laptop some years back (~$1500) and it worked good for basic stuff while I was learning Neural Nets. MSI was about the best price-wise and there was a slot for a 2nd SSD so it was easy to put Ubuntu on a 2nd disk and keep Windows as-is for other work.

I have to agree with other comments however. The laptop will run very hot under heavy training and in my experience, the mobile versions of the GPUs are not nearly as fast as the similarly named desktop versions but cost considerably more.

BTW... If you're just doing basic NN training for school you probably don't need a 14-core laptop and 64GB of RAM. You can probably get by with something smaller, maybe a 3070 or 3080 (no TI) and then rely on other resources like Colab for training larger more complex nets.