NAS + Game server + other services

Hello guys im in need of an bit of advice.
Im planing to use my home server with win server 2019 and it will be used as a NAS and game server mainly. Howerer i will be adding more stuff along the way and the question i have is how secure is this? How would i isolate this as it will also host my personal files.
My configurations is:
ISP-> Router -> 8 port gigabit unmanaged switch; tv,pc,supermicro server on the switch

My main idea would be making 2 vnets but i also need conectivity to my game server.
Any advice?
Would docker help with this?