uhhh
ok so first of all this site is incredibly useful (guides to everything + a database of all items and their worth)
there are a ton of ways to earn neopoints, u will find the way you like best, but playing games is a good place to start
honestly jellyneo has much better articles about starting out than i could write but also:
1. neopets has an incredibly strict swear filter. eg you can’t say god or damn
2. make sure ur neopets’ names start with a capital letter and have as few underscores/numbers as possible. people get really hung up on this for some reason???
also most importantly have fun