As title stated. Much appreciated in advance

To change size you must open console (~) and type g_multiplayer_limit X - where x is desired number.
you should do it in main menu, before creating lobby.

About name change - when you create lobby there is a text field with something like "Username's lobby" - you can change it to anything you want

Where do you open up "console"?

I also do not see where there is a place to change lobby name sorry. I'll log back in and see if i can find it

EDIT: oh my gosh....i do see where to change lobby name lmao fuck i'm dumb. I never tried clicking there. Still don't know about console though

EDIT: OH i did figure out what console means. Noticed you put in the symbol. Thank you for the help :D