Hi matpa,
Congrats on your graduation from Penn State. I've lived here for 4 years in Murrells Inlet which is about 20 minutes south of Myrtle Beach. I am old enough to be your father.
I would agree with Tinabean in that there are probably enough nightspots here to keep someone your age busy June thru October, but the place dies after that. The Grand Strand has within the past 10-15 years has attracted a large number of retirees primarily from the northeast, so this area particularly off-season, is decidedly aged, say 55+.
The job market is nonexistent here, primarily with only those types of jobs that cater to tourists and retirees. People fight over $7 an hour jobs.
The good side is that if you can find a job here the cost of living is very reasonable as far as rentals, taxes, etc. And coming from Pennsylvania (which is where I started out some 56 years ago) the weather here is great. Usually 70's+ from late March thru October and you'll make it thru the winter with a hoodie.
For Fatherly advice (indulge me here cause my son doesn't listen to me all that much), I'd suggest taking that accounting degree to a place like Charlotte (banking headquarters) or maybe Raleigh/Durham (research headquarters) which would offer more jobs, still decent weather, year-round nightlife, good college sports, and you could still hit the beach on the weekends in a 3 hour drive.
Hope this helps and best of luck to you.