Alright, I'm essentially completely new to simulation (haven't used it since freshman year of college), so go easy

I'm trying to design and build new tables for our production floor, and want to know if the design I have is going to hold up to whatever weight they might put on it.  Now, since I've never done simulation at all, I'm not sure what I'm doing wrong.  I've got an assembly made (attached), but when I do what little I know about simulation and try to follow the tutorials, the mesh never works and I get a whole bunch of errors.  It should be constrained on the bottom of course, where it'd be sitting on the floor (I believe this used to be called "restraints"?)

Can anyone help me out?  I'm not too worried about any lateral forces (yet), just would like to learn the basics of setting up simulation.

Thanks for any help, and I'll check back tomorrow.