As a newbie to having a greenhouse ( 12 x 8 kit from Costco) I found looking for ideas on how to best set up a greenhouse lacking. After much thought and consideration, I built a potting bench and a bench for starting seedlings and on one side and will use my grow bags for vegetable plants this season on the other. I expect it will change as I learn what it is I want out of it.
MoonShadows's recommendation to be flexible is well founded. If you set up raised beds it would be a lot more work than just moving containers, if you change what you want.
Good Luck !
