How would you describe your level of understanding of networking, including port forwarding, IP addresses, subnets, etc?
Do you have a preferred operating system? Do you have more experience working in Windows, OSX or Linux? How much time are you willing to spend learning if you want to change systems?
+1 for Radarr, it does everything you want plus so much more, highly recommend you try it out, one of the best tools to self host if you enjoy movies.