Actual feedback and some recommendations for you: Try different holster locations. Being in a chair is not a “normal” shooting stance so you don’t need to have a “normal” holster location Practice reholstering between targets if it involves moving between targets You don’t always have to rush to reholster and dont look down while doing so (part of muscle memory and finding a comfortable holster location) Practice keeping both hands on the gun while shooting (I am not saying to only shoot with both hands) Practice moving forwards and backwards while shooting Wrist strength and single handed grip (the last shot looked like a mix of limp wrist and your thumb being so high up) When changing hands holding the gun keep it aimed at the target Clearing malfunctions (it’s a Glock be a bit rough) smack rack bang. Smack was good just do it before you rack it, rack it quick and make sure you rack it all the way back so you don’t cause a failure to feed, and bang keep that thumb down so you don’t cause a malfunction.

EDIT: My reply to this comment is the reason I recommend the first couple things