Implementations are important & support is never better that the months leading up to a major deadline, but regulators expect rough edges during their first exam after a major implementation. They don't get anywhere near as worked up about implementation errors as they do about repeat violations.
I'm with RR Sarah & would start with items your management promised to do at the close of the previous compliance exam. Hopefully, you won't find too much criticism and maybe these items were fixed by your predecessor. Nevertheless, until you get a clean bill of health on these items they deserve a high risk rating (regardless of the severity of the violations) and frequent monitoring. To a regulator, a repeat violation says "you lied to me" at the close of the previous exam.
Next, I'd list all the product and regulatory changes that have occurred since the previous exam & check their status. Maybe you need to start farther back than the Reg. Z amendments.
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...gone fishing.