Ive have some questions which i would really appreciate all the info i can get

First one being, how many locks do you guys recommend i should have? i have a feeling as many as possibly to progress the fastest. so should i invest in buying more locks, or should i buy a big repin kit so i can change the pins. i like investing in hobbies i like, so i dont mind spending much money.
Also are the pins standard size? i currently live in norway, so which size is normal here?
Do you guys also recommend a kit thats good?
Thanks again for all the help!