It really is super easy these days. As another poster said using Sonarr (tv) and Radar (movies) then sign up for a nzb indexer like nzbgeek or drunkenslug and your download client like SABnzbd it’s as simple as telling the *arr apps what you want to download.

For extra convenience use a *seerr server like Jellyseerr to get recommendations and a better searching experience.