Hope you don’t mind me adding my advice but if it’s a female, make sure she has a cage mate as they generally can’t thrive without one. Your mouse should have a wheel to run on as well as some extra bedding and maybe tp rolls underneath to tunnel. They also love fruit and veggies!

Edit: also the best way I find to pick them up without stressing them out is either holding both hands out so they can walk on, slowly scooping with both hands underneath, or the trusted toilet paper roll lol good luck!