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Once grouping is solid then throw in some angles up and down hill..... you'll be surprised how different things are.
Practise standing in 'non-optimal' stances, kneeling, leading out behind a tree...

go to a local achery club and learn to shoot properly. Get your form correct early and at the start, it will be so much easier not having to unlearn bad habits.

then fling a crap load of sticks...