There are several ways to get there. I suggest planning it on an updated map--just easier to "visualize" when following on a map.
From Pop, exit WDW--just follow signs to Interstate 4, (I-4). Follow the signs for Orlando, NOT TAMPA!! Once on I-4, heading north, only a couple of miles from WDW area, you bear right onto Rt 528, the Beachline. (It's previous name was the Beeline and it goes right by the north edge of Orlando Airport) Take 528 about 55 miles or so, until it intersects with Interstate 95 SOUTH. Take I-95 South until you get to the Cocoa Beach exits. We like to take the third(?) Cocoa Beach exit. It is state route 520. Follow 520 east until you are at the beach.
Ron Jon's is on the corner of A1-A and 520, it is the largest beach/surfer shop in the world--or used to be. Anyway, our kids/teens ALWAYS want a RonJon's shirt.
Review to Cocoa Beach. I-4 East/North towards Orlando for a few miles. East on Beachline 528, across state to I-95 south. Exit third(?) Cocoa Beach exit onto 520 East and a straight drive until you hit the beach.
FYI, about 2 miles south from Ron Jon's on A1A in Cocoa Beach is a VERY nice public Beach called Lori Wilson Park. There are lifeguards and nice public buildings to change clothes. As all beach areas, lock valuables in the car trunk--out of sight. Nice place to spend some beach time. Lots of locals there too.
Goof