Get your RSA - it shows prospective employers that you are interested
You may need to start at the bottom and work your way up.. Pubs are always looking for glassies, there's also bistro attendant (basically a waitress! lol) which is what i'm currently doing. During down times they are showing me the finer points of pouring a beer.
Best way to get a job in hospitality is to walk in to the pubs/clubs and ask for an application form. fill in the details and give back to them - Never get discouraged if they say there is nothing available.. Hospitality turnover rates are huge (the pub i work in opened 3 weeks ago, and we've had 5/30 people quit already) so something will come along soon
Be prepared for long/hard hours in the industry.. lots of split shifts make it hard, but the work isnt too bad
Good luck!!!