Hello, I am new to speedrunning but not to bloodborne what category do you advice as a community to start out with speedrunning?

If you are very used to the game, I would assume Any% Glitchless then Any% Current Patch (No Clip) to eventually run All Bosses in the end. But if you want to be sure, you should just join the SpeedSouls Discord server, the best runners will help you: https://discord.gg/0S9je8Fk3vg2CZht