For what its worth ....
I started by going for a trial flying lesson, went solo and thought "iwant to do this as much as possible".
I then went for a class one medical to make sure there would be no nasty surprises. The doc at gatwick said I was ok, took £400 and gave me a bit of paper.
I then finnished my PPL and bought a share in a c172 to build hours flying friends round and splitting costs.
I then started a distance course with Oxford and finnished my ATPL exams 3 weeks ago.
In a week I'm off to IFTA to do a CPL/MULTI and then back here to do the IR.
As for jobs, well who knows, I'll find out when I'm there..
If you want more details of costs then msg me and I'll tell you what it's cost so far and whats left.
Good luck