Noob,
What's affordable? What are you willing to put into it? I've used several scenarios over the years from building on the floor to well built workbenches. If you're not doing much pounding or handplaning but just need something you can put your immediate work on with some tools you might consider a simple folding table. Get the Melamine kind, not the plastic kind. It comes in several sizes, folds up for storage, is relatively light, you can mount a router in there (relatively primitive, but workable) and can be surprisingly versatile. If the melamine breaks, it's easy to replace with plywood for a better worktable. I used one as a worktable on a jobsite once and was surprised how well it worked.
As for clamps: The more the better.

I always wish I had "one" more.

At home I use 1/2" pipe clamps: (economical, yet useful), C-clamps (3" and 4" usually), and the "Quickgrip" clamps of various sizes. I also have a slew of wood handscrews and medium spring clamps. My favorites are my Bessey "metalworking" clamps, but they're expensive. They will probably be more expensive than you want to spend unless you are using them constantly. The ones that imho are best for starting out are the pipe clamps and C-clamps. They're both fairly inexpensive so that you can get more, and most versatile to boot.
Have fun shopping for tools!