There is no "TLDR" of the GDPR. It has to all be read, understood and complied with. This is basic legal compliance, and is not at all easy for a small business.
Audit can take some time and have a real impact on your business though, so i'm not saying everything is perfect. But to me, audit is the only thing you have to be really afraid of, not fines.
https://ico.org.uk/for-organisations/resources-and-support/d...
It captures the compliance with a checklist which is shorter than the original 88 page law.