Okay, so curious about this for building purposes. The grind is getting to me. For stone specifically. Anyway, If I use F5 in my main game server, will it ruin the server for me later on?

Will I still be able to turn off the f5 options, and return to my regular vanilla map play??

Also, with mods, if I started a server for mods, can I switch back and forth between them or will it mod my vanilla game too? Curious, cuzz I have a ton of gold, and wanted to add a merchant, but not if it is going to ruin my vanilla gameplay eh??

And, final query.

I did start a new server using the Creative Commands, and now seem to be stuck in first person mode?? I can't see my character anymore, and I seem to be able to move the camera up and down, to the right and left, and see through terrains etc. But I cannot move my character at all . Any ideas on what I did, how can I undo it?? Cuzz I can't even access my inventory