Mt2 skin type 1

Hello guys I’m currently 21 days in to taking 0.75 mgs a day for 21 days and have done 6 5 minute tanning bed sessions to build up my pigment. I have never gotten tanned in my life cause I’m a skin type 1 ginger that has naver had a tan. But I feel like I haven’t gotten any result in those 6 session. Is it cause I’m doing to little mt2 or is it cause I just don’t respond or are my tanning sessions just to short. I started with 5 minutes to mby build up some tolerance but I hoped that I would get a little tan from that. But seems like nothing is happening to me