Artisan goods are how you really make money. You get a machine like a keg or a preserves jar and you put one of your crops in it and a while later it pops out an artisan good with a value some multiple of the crop you put in. Turning fruits into wine in a keg has the best returns but takes the longest. you should try to make some preserves jars early on and fill them with the expensive long grow time crops. Also the greenhouse is very valuable and you should focus on it first out of the community center tasks. If you've cleared more farm area than you can use for crops and animals plant acorns and grow more trees. You'll need the wood and oak resin later.