Custom chess board set up

You can create a daily game challenge with a custom position.
Setup the position with the analysis board and copy the FEN. Then create a daily challenge with the FEN.
You can create a daily game challenge with a custom position.
Setup the position with the analysis board and copy the FEN. Then create a daily challenge with the FEN.
How do I make a custom board, (Pieces on different positions as starting point) then play by myself? (Not against a bot or person) The person Agadmator does this and I'd like to try it.

Learn -> Analysis
should allow that, although I never know what is available to everyone since I have Diamond membership

There's an 'Analysis Board' option in live chess too. Never used it, but you can paste in FEN/PGN positions then invite someone to the board so I assume you can then play it against them.

ok but how do you do it if you want to play a live chess game against your friend and you want a custom position
You might be able to do it with a Live Analysis Board but there wouldn't be timers or anything. Right now you can't play custom positions in Live.

How do I make it so I can have as many pieces that I want on either side?
How can I play a game from a custom position? - Chess.com Member Support and FAQs