It's not a MAJOR deal- it just looks to me like the cup spun out- the majority of a bottom bracket spins in from the right/crank side; what you're looking at there is basically a beauty trim piece. If you haven't done it yet, spin it back into place and ride over to the shop and see what they can do (teflon tape would be my home fix; maybe blue loctite, but I'm just a shadetree bike mech).

Then start your tool collection with an 8mm allen wrench, a crank extractor, and a bottom bracket tool/adapter (maybe $20 total)