The main thing you need is a new GPU. You can probably get it second hand.
That would make things a lot easier.
To be clear, it is totally possible to make a world winning game with that setup ( new GPU ). Having hardware that’s right on the edge, is great for knowing immediately when you have performance problems with your game
Of course, if you really want a laptop, it’s up to you. But generally speaking, corners have to get cut to put things in a laptop, and a lot of what you’re paying is for just that. So unless you have to have one, get a desktop.
It’s true, you don’t usually get a megagrant for being a nice person