I forgot about tabs. You can either get the construction level for it or join house parties and hope they have lecturns available. There are a few tabs that make ~500k gp/h.
Cannonball smithing and gold ammy smithing are low effort okay gp moneymakers.
Superheating steel, addy, and rune can make you some money and train your magic level early on.
Its probably 50-150k gp/h, I've got no idea how slow it is to make. If you want something super afk then cannonballs might be a good idea. Gold ammies u are 100-200gp profit each and you can make close to 1,200 an hour so that would be better. Gem-encrusted jewelry takes 5.3 seconds to make (smelt + enchant) so you might want to look into making recoil or duel rings as well.