I just wanted to share this link I found with multiple training slides on CRA. I am aware that they are not the most current and the new rule will be out soon, but I felt it is a good breakdown of the basics. I have been out of banking for a while (I also remember the dread I felt years ago when someone randomly came in my office and said "Hey, you are the CRA Officer"!. I had no idea where to start
These might be helpful to any newbies as they are well organized and succinct.

https://www.kansascityfed.org/community/community-development-investment/cra-workshops/

Again, please keep in mind date of these slides. That's my disclaimer

I took a quick look and there are a couple of outdated points (such as the reference to the annual HUD EMFI data).