did you hit your target at all ? or did you hit and you expected small groupings ?
to do the first, follow all what has been said above, and lots of practice....
and if it's the second, don't until you have lots of practice, and then it just might not happen, there have been reports of 2 inch groupings, but expect 4-6 in groupings at 100 yards
use the rifle for what most have purchased it for, a lot of fun and the ability to shoot lots of rounds for very cheap....
try if your range allows, setting up some pop cans or water bottles, at least if you hit them you will know your on target......and your aiming is good....
have fun