Welcome to BOL, Jazzy... and better yet, welcome to RESPA/TILA/TRID!
This is a really big question, and a tough one at that. Without knowing your full scope and what else may have been planned for this review, I would think that starting with consumer mortgages would be a great place to start. There are plenty of other things besides mortgage discclosures in those rules, but I would start here first and then dig into other high-risk areas later.
To conduct your review, there are a few resources that might help you (besides BOL of course!):
-The CFPB has a fairly good resource page for learning TRID rules: https://www.consumerfinance.gov/policy-c...isclosure-rule/
- For Reg Z, you could start with the CFPB exam manual, but there is a ton of information in there: https://s3.amazonaws.com/files.consumerf...-procedures.pdf
-For RESPA, the CFPB also has an exam manual: https://s3.amazonaws.com/files.consumerf...-procedures.pdf
Another thing you might consider is attending some sort of training. I know that John Burnett (a BOL guru) conducted two webinars here on BOL on both the Loan Estimate and the Closing Disclosure.
The LE webinar can be found here: https://www.bankersonline.com/webinars/loanest0718
The CD webinar can be found here: https://www.bankersonline.com/webinars/closingdisc0818