Not an ideal venue for a little fella if your looking for bass.
Best fished an hour or so into a rising tide, preferably at dawn or into darkness, fish out in the surf upto your knees/waist (its a long shallow beach, otherwise you'd need a monster cast to get out where the bass generally are) and move back every 15 mins or so with the tide, rag, lug and razor is generally all thats needed and a cast of 50 yards or so.
The beach has some quite deep gullys, so scope these out at low water to give yourself an idea of the depth of water that can be behind you when your retreating, you can be ankle deep one moment but 10 paces back upto your waist - be careful and best fished with another adult.
Travel light, some lads just fish with rod in hand and bait in there backpack/pocket, others will use a tripod and a bucket hung underneath with bait in.
There are bass to a decent size on laytown, and can be caught quite regularly with the right tactics and a bit of good luck
Some of the wicklow/wexford beaches may be a better choice of venue for bass if your bringing the little fella with you as these can be safely fished from the shoreline without the need for wading out.
Maybe I'm stating the obvious, but if your only fishing 3 months, familiarise yourself with some of the common types of fishing rigs, hooks sizes, line strengths, bait presentation etc (plenty of online vids) - this will undoubtably give you better results.
When I started sea angling a few years back, I was using 30lb mainline, size 3/0 hooks and tennis ball size lumps of mackerel - little wonder I wasnt catching fish
It was only meeting a few lads off this site and online research that developed my skills quickly, and immediately improved my catch rates.