I’d invest in a used x86 SFF PC over a RPI for performance, you will pick one up cheap and it’ll be way better suited for a media server over a RPI.
Look into Tailscale for remote access. Very easy to setup and their free tier is generous. (100 devices I believe).
I’m a big supporter of RPI, purchased many different models over the years to run various services in my homelab. At this price point it doesn’t make any sense at all. Its USP was very low cost hardware to run Linux. I hope this isn’t the beginning of the end for them.