First and foremost, get your ATPL utilising whatever concessions the CAA are granting these days. My licence and IR cost me less than a grand but that was a long long time ago ! No point making an application without a licence.
Work out in your mind where you want to start and where you want to finish - they may not be the same.
Multi-sector LoCo or long dark nights on longhaul - whats your preference ?
Do you want time at home or time away ?
'Never move for an airline' is a well known saying !
Ask yourself some serious questions about why you want to leave - you would not be the first to leave simply because your
mates are doing the same.
Military and Commercial flying is very different - some things you will greatly miss, other things perhaps not !
Timing is everything. A good decision can see an early Command, a bad one can cost you ten to fifteen years in the rhs.
Wives and partners have a tendancy to tell you what you want to hear and not what they really think - talk it through. I cannot stress this point too strongly.
Good luck in whatever you decide !