In knowing ahead of time that it will be a DIY project, good designers will make choices to fit your design goals, one of which in this case is to be able to build it yourself. They will not spec a jack floor if you don't have the necessary skills. Instead they will suggest something more appropriate for your situation, like pucks or U-boats, and probably even help you source the materials.
Still, you should familiarize yourself with common mistakes to avoid. A build team with zero experience in studios can still mess up a good plan, even with the best of intentions. However, with some self study and a designer who keeps your experience level in mind, you should do fine.
The thing to worry about is when in the middle of the build you start saying, "couldn't I just X-Y-Z instead?" Well, if you didn't want to the meet design goals, then you could start second guessing the designer, but then why hire one in the first place? Any project limitations you should let them know up front, and they'll warn you of any compromises, but you'll get the best room possible within your constraints. Just follow their advice. Too many times I've seen people leave out vital pieces of the build, or make major mistakes while thinking they were just making inconsequential adjustments.