I’ve done this too. Quite the contrast to my disorganised life. I have two types: lined and square paper. Both hardback and book bound (find ring binds don’t play nice with me and I lose pages). Get the exact same ones each time, apart from a few old ones whilst I was in my discovery phase. The lined ones come in a stack of 5 so always have one ready to go.

Also use a single type of pen: a black staedtler fine liner. They in a box of 10.