I'm an idiot and need instruction for windows 11 please

i was trying but im getting this

cleanarr\backend>PLEX_BASE_URL="http:localhost:5000" PLEX_TOKEN="****" LIBRARY_NAMES="Movies2025" PLEX_TIMEOUT="7200" FLASK_APP=main python -m flask run
'PLEX_BASE_URL' is not recognized as an internal or external command,
operable program or batch file.