In the town square there are two NPCs named Yvonne and Oswald. Yvonne will sew patches on to your clothes for gold while Oswald will enchant your clubs and attach improvements for gold and bolts. Walk up to either of them and press E.
When you chat with Yvonne it will pull up a screen with your clothing that has patch slots. Select what you want to enchant and then select which patch you want to enchant it with. Once you confirm it your item will be enchanted. Each clothing item can only be patched a certain amount of times so choose wisely.
If you go up to Oswald and talk to him he will pull up a menu with all your clubs that can be enchanted. Select which one you want to enchant and it will tell you how much money and bolts it will cost for the attempt and how likely it is to work. If you fail an enchanting attempt your club's enchantment level will go down by one.How high a level you can enchant your clubs depends on how high a level they are. Keep in mind though, the higher the level you've enchanted them to, the lower the chance of success for the next enchanting will be.
If you want to fit an item to your club you'll need to talk to Oswald again and then in the upper corner of the screen you need to hit go to fit now. You'll select the item you want to enchant and the mod you want to enchant it with and then hit confirm and your item will be enchanted.