Hi Roque,
I can confirm that there aren't any newer courses for Talent. All the new things are available (for now) on docs.microsoft.com and in the Partner Bootcamps that I sometimes deliver.
For the security part in CoreHR, the best way is to search in the F&O and AX documentation.
For the security part in CDS (Model Driven App), the best way is to search in the CRM documentation.
best regards,
Nicu
read my blog: https://talent.asgcrm.com