You could make PiHole VPN: https://github.com/pi-hole/pi-hole https://github.com/pivpn/pivpn

For Movies: https://github.com/Radarr/Radarr https://github.com/Jackett/Jackett

For Scientific Research: https://foldingathome.org https://boinc.bakerlab.org/

PS: I did create some project : https://github.com/vs4vijay/SwissArmyPi