I agree with this. Train the way you carry.The idea to take a class or three is a good one. Make it your new years resolution. Memorize and diligently practice the four rules.
I'll argue with the well intentioned folks who say to not use the manual safety on your pistol. That is bad idea.
If your pistol has a manual safety, you should train to swipe the safety off as part of your drawstroke.
Ignoring or treating the manual safety as always off can be a fatal error if somehow the switch gets inadvertently gets switched on. I have seen this happen more than once in competition.
The smart move is to buy and train with a modern pistol that has all internal safeties. No manual safety means nothing to get turned the wrong way, nothing to forget to switch off in the heat of the gunfight.