Before sighting in your Eotech, do sighting in your back up sights.
Sight them in at 25 yards (at least). Like everyone else said practise breath control & trigger control. Fire 5 rounds and adjust if needed and repeat.
Once your backup sights are sighted in. Then sighting in your Eotech by moving the dot to your backup sights aiming point.
Do watch some youtube videos how to sight in.
Hope it helps..