Wee reminder about the drive side being reverse threaded that i found on Reddit!
“The tool you need is a cartridge bottom bracket tool. They are specialized, but not too expensive. The Drive side (where the chain is) is reverse-threaded. (Righty-Loosey/Lefty-Tighty)
When you install a new bottom bracket, bottom out the drive side threads first, then install the non-drive side cup.”