How long should it stay on mild bleach hair?

I bleached my hair ginger every half a year in a salon so I wanted give MP a try! Any recs how long should I leave it? I wanna try maybe 2 hours? Since I’m scared to leave it longer or overnight… I want to have natural ginger hair, now after color is washed my color is light brown Also heard I need to wash my head first and then MC, and then wash it with cold water, everything right? Thank you❤️✨

I bleached my hair ginger every half a year in a salon so I wanted give MP a try! Any recs how long should I leave it? I wanna try maybe 2 hours? Since I’m scared to leave it longer or overnight… I want to have natural ginger hair, now after color is washed my color is light brown Also heard I need to wash my head first and then MC, and then wash it with cold water, everything right? Thank you❤️✨