lots of subtle points , hard to cover them all,
if there is a public range anywhere, worth trying to see others,
maybe strike up convos and they could give you tips,
as others stated, keep relaxed, and use the same anchor point,
as for adjustments,
do not try to adjust the bow everytime,
you groupings should be consistent, even if they are 4" off the mark, as long as they are all off in the same general area, say lower left,
when your groupings are tight and in same area off the mark, then can work on adjusting the sights,
when practicing, dont try to spend all day firing +50 arrows,
if you have a high poundage bow, will get shaky and will become harder to stay on the mark after multiple shots,