I worked for several years as cabin crew for a major UK airline, and as in this thread, got the bug and idea of moving forward towards the front. This is by no means an impossible mission (albeit one with which you will certainly have to persevere!) and anyone who has the idea I would actively encourage them to do it.
Look at
all your options tho (to make it more realisable) I considered the JAR ATPL route (sometimes still do) but instead due to dual nationality with Canada, came out here to do my Canadian CPL/MEIR (ATPL in Canada kicks in at 1200hrs I believe but there is no "frozen" option) The cost saving in doing my licences here was pretty huge, but beware that not all ICAO licences carry the same value in the commercial pilot hiring stakes (luckily Canada seems to have a level par with FAA licencing, but not JAR, who want around £10K to convert!!!
)
Be prepared for some intensive work to get those licences and above all be patient. Getting a few lessons under your belt to get the "feel" for flying is a great idea, as it's not for everyone and does require a certain set of skills.
Good luck!
