Down the rabbit hole

Down the rabbit hole with cuterabbit.

emm，not really... elbow not in the body.

It just stops you starting up lots of threads about differnt stuff. I did the same for me.
Makes it a bit less of lots a threads about stuff some, of it that has been covered on this site before. Also lot of the ppl here are many years into air rifles and newbies like you and me tend to ask the wrong questions in the wrong thread. It stops that too, but is still accessible to everyone.
When you hold your rife try grabbing it at its point of balance on the stock.
Then with the butt very lightly against shoulder, move your elbow on the hand you are holding the rifle with onto your hip. This will help take the weight of the rifle by pushing it down wards into your hip. You will notice that as you aim the gun is going up and down with your breathing. Get the rifle on target and when you are on target and getting ready to pull the trigger hold your breath. This will stop the breathing movement and make the rifle steadier.
You should be holding the rifle the same place every time and same way everytime. If you don't it will shoot differnt everytime. Spring or gas ram rifles usually need to be held the same place and same way to be accurate.
Hold the gun very lightly, it will not jump out of your hands or anything, they do not have enough power to do that in the smaller calabar range.
It will need practice. It is not usually something you pick up strait away. Once you have it sussed, your shooting should be more accurate.
You can adjust what I've said to suit you, but that's the basics of the arti-something hold. It may be that you find a way that suits you better, or maybe your gun isn't that hold sensitive.
But if you have a lot of kickback it is a good way to start controlling it.
That kickback will make you shoot not accurate everytime you use it if you don't hold it the same way every time.
Thats the other reason for using this thread. People can give long explanation and it doesn't fill up a differnt thread. It's easier for you to look up stuff later that you asked because you know the answer is here.

Your arm is probly not use to holding a rifle up. You will have to just keep using it and it will get stronger.
Some rifles are heavy. I've swapped a very good rifle for another lighter very good rifle, because it was to heavy to carry hunting all day for me.
If your arm gets tired have a rest.
GAMO are light rifles. Some people love them some people don't.
They are not the best rifle for target shooting,in my opinion .
You may have to go through a few rifles to find one you like. Don't give up on using the artillery hold as it very difficult and it will take a while to get use to it. In the beginning it will not be very accurate because you haven't practiced it.
If your arm gets tired have a break.
When I did target shooting more years ago than you probly are old, one of my shots took 21 minutes. I stopped and rested, I had to stop and breath because I had held my breath for to long more than once. But it worked. I put 5 shots into a group that was barely bigger than a pellet hole at 10m. ( they did ask me to shoot a bit faster after that shot)
Target shooting is about technique and presison. It is also a about the gun if you want to compete. You will need a good gun or make your gun a good gun by changing things to work better.
At the moment you can pratice your shooting technique with your guns and get that right, but probly will have to get better guns to compete in target shooting. For fun target shooting they are ok.
It takes a lot of time and a lot of learning to shoot springer air rifles.
It takes a lot of pellets.
You are right to ask stuff, you need to, to learn.
Its just the beginning, don't rush, don't worry if things arnt happening fast it takes time.

You can try putting the rifle on finger tips at the front. It means your hand is straiter and that means your fingers are supporting the rifle further forward. It is how I use to target shoot, I don't like it for hunting, and don't use it much anymore because I mostly hunt so pratice how I hold it hunting.