Call it what it is!
I dont take offense to the word newbe or beginer, we all were at one time.
I like to use the words “new player”, and we always team them up with the best players at our board, we show them as much as we can and explain why we do certain things and the game isnt the end of the world if you crap out on rolls or make a bad move.
We also tell them why we attack where we do and each player has a different plan of attack,and let them choose what they want to do. Some times we reset pretty early too
Its good when a newly started player gets good dice and they can hammer an old pro