mallard, you say that you are 11? A good choice of shotgun for you would be either a 20 ga. or even a 16 ga. I would also try to find a good semi auto shotgun in those gauges. Most semi autos seem to have less recoil than your pumps, single shots, and bolt actions.
However, be carefull of what semi auto shotguns you buy. If you buy some older semi autos, the actions cycled by (recoil operations) Which seem to give off more recoil than the modern day (gas operations).
I have 3 Browning a-5's, I have a browning gold hunter, I have asmith and wesson 1000, 3 remington model 11's, winchester model 7, savage model 720, remington model 11-48, remington 48 sportman, 3 remington model 1100's and a remington model 58 sportsman.
These are my semi auto shotguns. Some are recoil operated, some are gas operarted, and some kick a bit harder than the others. I love them all. My preferences as far as (shooting) are my remington model 1100's.
But my absolute favorite to shoot is my Remington model 58 sportman in 16 ga. I love shooting this gun, I honestly don't feel it kick at all. I sometimes find myself laughing in between shots because it is so fun to shoot.
The 58 sportsman might be a little hard to find, but sometimes you see them pop up at gun shops or gun shows in your area. The 1100 can be found at your local gun shops and it is also a good reliable semi auto.
I personally like finding some old relics at gun shows and see what they are like. If you pay attention and look around, you can save yourself some money by buying used guns.
I used to buy only brand new guns when i first started collecting, but Im glad that I started buying used. I have founds some great deals and have also discovered alot of history in those old timers.
Some good rifle rounds that you will like are .243 win, .244 rem. 6mm, 250 savage, 257 roberts, 7mm-08, 30-30, 300 savage
If you pick up one of these calibers in a classic firearm, you will be happy you did. I like the 250 savage, 300 savage, and 243 in a savage model 99 lever action. (YOU WILL LOVE THESE GUNS) I like a full stock mannlicher style in 243, 7mm-08 and 257 roberts.
And because these rounds are considered mild cartridges, they are great in any well made bolt action. They give off very mild recoil.
If you like a bit more recoil, try a 264, 270, 280, 308 or a nice 30-06.
( But I honestly think you will like the milder rounds
and the nice thing about the mild rounds is that you dont have to grow out of them if you don't wish to.)
Good luck with your choice, there are many. Don't rush your choice either. Shop around, you just might find an old relic gem in some little gun shop.