hey guys, i recently got a remee for christmas and i was wondering what method would work with it the best? and also how i can more accuratly figure when my rem period is?

BTW, remee is a sleeping mask that flashes lights while you sleep in hopes to notic them and become lucid, it is a light timer. Please do not tell me my money was wasted and its stupid, as it was a gift, i know it works for most but it takes time + LD experience and a decent method. THank you all for reading and any responses are very much appreciated!