Hi Ross,
The lads on here know their stuff, all that`s been said is good advice .
Main things to pick up on, - your budget, BSA Ultra, Springers namely HW 97`s, AA Pro Sport and the AA TX 200 HC.
I would go springer if i were you, to restart your interest and "hone" your marksmanship. Then pcp afterwards.
I would lean towards any of the HW`s or Air Arms springers, whichever suits you best.
Good luck with your choice