Help me fix SEO errors found in SEMrush

Hello. i have recently subscribed to SEMrush and I'm running the site audits to find errors and warnings etc. I understand most of the errors, but i need a hand fixing them. All kinds of errors like duplicate titles, broken links, redirect issues, site map problems. Lots and lots.

This will take me too long to learn what these error are and to fix them.

Can you assist me?

Please reply by repeating my problem, and how you understand it. And how you can assist.

thanks
Kevin