Okay then
This is my carefully culled from experience list.
1. Learn the basics of shooting - how to mount the gun, where your hands and eyes should be etc.
2. Try every gun you can. Get friends and coaches to let you try their guns. Hire club guns. Fall in love with something very expensive.
3. Listen to the advice and prejudices and preferences of those you know. Be amused at how people seem to either love or hate the Beretta DT10 and the Miroku MK38 and have serious views on brands without much evidence or reason.
4. Go around all the gun shops and announce you need a gun, your budget is £X and you like Very Expensive Gun, what do they have for you? Try holding all their guns. Listen to the advice and recommendations as a good gun shop will be able to tell what might suit you. Do not get swept away at this point.
5. When the recommendations start lining up with your thoughts from holding the guns, try shooting the models you like. Gun shops will loan some stock if you are a serious buyer.
6. Once you've chosen some models you like, look around them for similar guns e.g same maker, next model up or down, same make and model but premier version compared to basic, same make but earlier model version.
7. When you've found the make and model you like best, find one in your price range and buy it. Post ecstatically on ShootClay Forum.
8. Shoot with your new gun for a bit and then get it fitted.
9. Shoot more until you find yourself giving the same advice to people even newer than you.
Everyone said to me get O/U 12 bore, doesn't really matter if you like 28", 30" or 32", multi choke is important. It was a salesman who recommended the Browning 525 to me, I thought I wanted a Beretta, but what did I know? But they can be worth listening to.