I think you can do 10 level 1 enchants on wooden tools, would be the cheapest way to do it, and killing mobs at any of the is warps that are grinders would be best way to get exp (/is warp grinder is one of my go to’s)
To enchant the stuff just use an enchantment table, you shouldnt need bookshelves for it to count for the quest, but if you do you’ll need 15 bookshelves around the enchantment table, where it goes enchantment table, then every block around that is air and then every block outside of that is bookshelves
If you still need help with it by the time you next see me on, send me a message and i’ll let you use my enchantment setup