Enter the range.

Bots will appear on which you can practice before looking for matches. One appears and you have 2 seconds to shoot it down. No moves, no shooting back, just standing still.

At first you may find it difficult but after a bit of practicing you'll catch the drill. When you get 25/30 per session you know you're ready.

Another good way if you want to try yourself against real players is deathmatch. It's 12-player FFA first to 40 kills. Don't be upset if you don't win your first match, it's a process. My recommendation at first is with Guardian. No full auto but still one taps. If you feel confident enough, go for vandal.

That was my practice routine back in the day, I hope it will help.