You have to modify this solution to your own needs but it covers the basics.
If you don’t want to run 4-5 coax up your mast, you have to use a dome. You can do everything you want with a HD 5G dome but you need a managed switch to connect the starlink… or you need a second router (like a B One. ) in Synergy.
The pro 5G and 5 coax works, but a dome will always be the solution for less cabling.