SSL & SEO Technical Refresh

My business site is up and running, but several technical pieces now need attention, starting with the SSL certificate. The certificate is already purchased; I have the CSR issued by DreamHost and it must be correctly installed on the domain that sits with Network Solutions... (Budget: $15 - $25 USD, Jobs: AI Integration, Internet Marketing, Link Building, SEO, SSL, Web Development, Web Security, Website Optimization)