When you don't have an exact name it would help if you could either provide a specific link to that map or the filename and date of the file in your etmain directory. Fritzbot already supports 2 maps that could be called "beach" (et_beach and mp_beach).
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OK after flying Around IMHO;
(1) 
ae_sniper_challenge
No objectives, nothing for engineers to do, the bots can't work the lever and are highly unlikely to cross the river on the high wire. Basically it is bot bored to suicide. If you want to try learning waypointing just learn how to do nodes, connections, roams and camps because that is all this map will support. Sorry.
(2) goldrush2_wx
Another goldrush variation, some good maps changes, others just convoluted. Likely possible candidate but myself not having played this one I would personally prefer to do goldrush2_fk_b1 (fewer changes less convoluted). Goldrush is Crapshoot's map so he gets first refusal. If you really want to learn waypointing this project would give you the chance to see how goldrush works and learn from the
Master 
(but work on something simpler first).
(3) atlantic_wall_full
Probably a candidate, but a bit bland. Good map for a beginner waypointer IMO. If more people vote for this one it could be done as beta in a long weekend I think.
(the opinions expressed in this post do not reflected those viewed by placig a mirror in front of your monitor )
(4) if beach.pk3 is the beach that you mean, you should realize that it is just the old old old map that mp_beach, et_beach ( and others 1944_beach...) were made from. It is blander than the newer maps but could likely be waypointed using the et_beach waypoints for an initial template ( assuming that the coordinates were not all shifted). It could be another good map for a beginner waypointer. The editor is not that hard and we would help you through the process.