One thing you must understand when driving around Disney property is that everything is arranged in "Areas". Normally the "Area" sign will be the first one you see, perhaps followed by a details sign (indicating what in in that area).
An example - we always stay at OKW, which is in the DownTown Disney Resort area. The first time we went, we saw the sign that said DownTown Disney Resort area, we didn't know that OKW was in the DownTown Disney Resort area. The sign that followed did have OKW on it (and a bunch of other resorts), but there were so many resorts listed that we missed seeing OKW, and missed the exit. Not a problem, we just took the next one and drove around a bit.
So, figure out what Resort Area you are staying at, and look for THAT sign first. It should be one of the following:
Downtown Disney Resort Area
Epcot Resort Area
Magic Kingdom Resort Area
Animal Kingdom Resort Area
Not sure if there are any others. I don't think MGM has a resort area becuase it's so close to the Epcot resorts, but I can't remember for sure.
But other than that, the signage is pretty good, and you shouldn't have any problems. The best map I've found (and I looked at a LOT of maps!!) for getting around (driving) is the Disney Transporatation map that you get when you check in.
Here's a link to a good property map:
Disney Property map
Have a great time!!!