DKIM, SPF and PTR problem

Hello, please I need a help. when I enter "WHM" Email Deliverability sho me problem how it's DKIM, also SPF and PTR, I don't understood how to fix, next when I enter my Cpanel here show me just only PTR Eror, here I upload also screan, please healp me, I need so much to use my email, also I pay to many money for vultr vps server and c panel and now I dont can use, someone have some video leasson how to fix or article ?