The garage by my house is 24x24. On the walls opposite the doors, I have a 24" work bench on one side, and a Shipsmith Mark IV on the other. Along the one side wall, I have 18" shelves all over it, and on the opposite side, I have 12" shelves, and a set of pontoons from a small catamaran that I was building. I still have room for two full size cars, space to walk around them, and junk stacked all over the place. You'll be fine.
But if you ever get the chance, buy a piece of ground, and put up a pole building. I had the Amish build me a 30x50 insulated, metal covered pole building with two 10X10 doors, a man door, and a 5" fiberglass reinforced concrete floor for $16k. That was less than half what everyone else wanted. And they did it in a week.