I know you bake from time to time, so maybe bake things that freeze well. So for example you can make cookie dough and put it on a tray and freeze the dough balls and then put them in a bag to store and pull a few out at a time to bake when you want a treat. I know you're on a budget so this also works great when you can buy things in season or in bulk or on sale and make a bunch at once.

Also, you can hide ingredients like flax seed or something of the like to boost the health factor. You can use coconut oil in place of vegetable oil. On that note, there are tons of wonderful sweet treats made with honey, agave or other natural sweeteners that aren't so high in processed sugar. Also, you can do things like Zuchinni or pumpkin bread to up the nutrition. Bananas and applesauce can also be used to sweeten and take the place of binders like eggs. People put black beans in brownies... Just a few ideas.

I wouldn't throw away a hobby... I'd maybe take a new spin on the hobby and challenge yourself to see where it can go. Your brain craves the sugar. It needs it for fuel, but natural glucose is best. Get creative and see what you can do!

ETA: if you want to make a multiple serving dessert like a pie, you can always challenge yourself to find a gathering of sorts to take it to so you can share it or invite someone over. I know that may be uncomfortable, but people are great and especially when you feed them awesome treats!