Need a server to store/host my metaverse built using Unity..it is a fully functional comedy club

First , let me explain I am not technical, so bare with me..I had a developer create a functioning comedy club metaverse, with avatars that can be deployed at the ticket counter and a microphone on the stage for the performer to use...I need the metaverse stored and hosted. an NFT gets the user access to it..Rightnoww it is testing phase and it is working but I do not know how to have it transferred so that I can control it and modify it..if you can do this, please be specific in terms of the cost and ensuring I can have the access and ownership