do I have to change my routine?

I am trying to target various things at the same time. I am 39 and a half years old. I'm suspecting I am perimenopausal because I had an acne breakout (the last time I had a severe one was when I was 18 years old) and a melasma appeared on my forehead. I forgot to put sunscreen on my profile but I am using one from Isdin. I need help to build a routine.