Hi,
This is my first year of growing veg and we are restricted to pots as we only have a small patio.
Best ones were french beans - climbing and dwarf, carrots seem to be doing ok, and potatoes in patio planters which you can buy specially.
I think things like spinach might not be worth it considering the amount you will get in a couple of pots, where that space could be used for other things that will produce more food, but it's up to you.
I would say try and grow a few of as many different things as possible - you will learn a lot and get a good idea of what will do well in your garden so you can concentrate on those things the following year.
Oh, and get a lot of copper tape. A lot.
