Need recommendations about pens for note taking

Hello there,

After 2 years of taking notes digitally (with my tablet), I've decided to migrate again to paper before I start my Master's degree. Because of that, I've been considering using an Fountain Pen and a Gel pen for quite some time and from what I've searched, I really like the novelty of FPs and the idea of not need much pressure to be able to write, but I also now that's a niche case and I'll mostly likely get both types of pen.

That said, I would love to hear what's your recommendation on what I should get. The ideal would be the cheap ones so I can just get started, but I know that even between the cheap ones I there's the little gems that are worth it.

Besides that, since I don't have any notebooks anymore, I need some small books with decent paper, so what's your take on that part? If it's graph paper, it's even better since I'm currently mostly taking classes about math like number theory.