Do I Need To Hire Someone For This?

I recently posted about having a lot of structured data errors and couldn’t really get a solid answer. So, I took the initiative to try to figure out what was happening.

Original Post here: https://kriesi.at/support/topic/error-in-structured-data-insane-amounts-of-errors/

This led me to find a post about something that was very similar that has since been closed.

Find the post here: https://kriesi.at/support/topic/structured-data-testing-datepublised-missing/

I think my issue is that I used the Avia layout builder for all of my content, even my blog posts which is the reason I have so many errors. I know that the thread above is a few months old, but I am guessing I’d need to hire someone to fix these issues?

Also, would like to know how expensive this would be to fix. My post’s aren’t indexing right in Google because of this.