My suggestion would be to find a nice tree with a noticeable area that you can call a “target” away from civilians.
Do some target practice for a bit, and just pick your arrows back up. You’ll notice Henry’s skill begin to increase, as well you as a player will get a better handle on the aiming mechanics.
Effectively, you need to practice to improve like a real person =)

if you play game on PC lock and pocket picking is very easy so like always ps4 and xbox was left with shitty gaming experience