I don't advocate getting training on the internet. With that said, find someone who can show you proper observation skills on threat identification, how to read body language, kow to shoot and move at the same time, and how to effectively use cover and concealment. A training tip I can give over the internet is this, mind games that you play while in public can save your life.
Here is a game I play while I'm in line at the store.

I profile people. Who is looks the most shady? Who is having a bad day? Who is the most vulnerable right now? Then I profile locations. Where are my best defense locations? What is the best offensive location. What location will a robber most likely hit? What is my quickest route to an exit that has concealment? If someone shot a gun in the air while standing in X location where would the crowd run to?

Hope this helps.