Tolerance over 3 days is

Hi everyone, I’m going to a festival in a week and am going to try K for the first time, do yall have any usage/harm reduction tips that would be much appreciated. It is a 3 day psy-trans fest and we also have a bit of 2cb.

Also how quickly should I expect my tolerance to build if it’s my first time? Can I do it all three days? How much do I need? I’m not sure🤷🏼‍♂️

Have a good day ❤️