Yo.
Firstly it costs a lot to get a license and its hard to get a job. Once you have one though the wages vary depending on how you got in that is did you start on a jet or work your way up.
I'm sure someone can correct my figures in the lower end but the jobs in the UK pay about;
Beginner
Instructor ????????
Piston twin/Turboprop F/O about £20 000
Turboprop Capt/Jet F/o about £35 000
Jet Captain about £55 000 +
I think you have to love it to be honest
good luck with your decision
NG