i was doing about 1-1.5 foot groups, with a sleeping pad as a rest. I have trouble putting the sights in the same place each time, i am not sure were the front post should be in the rear peep. I have an idea, seen one picture of it but have not got that down yet.
A lot of folks have trouble with aperture sights (or "ghost rings"). But it's like riding a bike. Once you get it, everything will come together and be as simple as... well, riding a bike.
As this picture shows, the tip of the front sight is at the exact center of the rear 'ring'. Don't try and concentrate on this too much. Relax and concentrate on the front sight. The human brain likes things to be symmetrical and will want the sight post to be centered horizontally. If you concentrate on the top edge of the sight post, your brain will want it to be centered vertically as well. Dry fire your rifle, aiming as a light colored, blank wall and practice this sight picture.
Here is the above sight picture with a "six o'clock" hold. This makes it easier to hold your sight in the same place on the target. If this target was at 100 yards, and your rifle's rear sight elevation was set to 100 yards, it should group your shots at the bottom of the black circle. And that's just fine. That's where you were aiming. If you wanted to put your shots in the center of the target, you'd need to adjust your elevation at the Garand's rear sight. (If this happened to be a 6" black circle and you set your elevation to 200 yards, it should move your shots up to about the center, give or take a click).
Obviously the "six o'clock" hold is really only good for shooting paper targets, but it will help you practice shooting and get your shots where you want them. Once you've mastered sight picture, trigger control, follow though, breathing and can get your shots consistent, then you can play with other types of holds without just frustrating yourself.
I got these diagrams from
this page. It explains these concepts in more detail.