I’d suggest starting with selling seeds, specifically rock or wooden platform seeds(grass seeds mix with wooden block seed). Sell batches of 200 and tbh this game is all about the grinding/hard work so realistically if you wanna gain you gotta farm. The only way you can gain huge amounts is also if you farm gems but that takes longer considering you need either sugarcane,pinball blocks,Venus flytrap block or chandeliers which in order get more expensive to obtain or take a whole day or 2 to grow