It all depends on what YOU want to do. I learned the trade from the ground up, starting without any formal qualifications so once I had the FAA ticket I had a much wider experience than just dispatch.
Very few companies will hire you just 'cos you have the licence...they will be looking for experience as well.
I would suggest applying to the aforementioned charter companies at LGW BEFORE you commit to the US$10,000 plus expenses the licence will cost you. If your not tied to working in the UK, then Farnair in Switzerland is regularly on the lookout for Ops staff.
Whooaahh!!!