1st death anniversary upcoming, how do i prepare?

hey there…. last december, my brother passed away during a stressful time in our family’s lives - which later turned into more stressful events to no fault of him. basically, what i’m saying is last year this time was not a fun, happy moment…. november-february was rough. my brother died in december. my mental health on a “normal” day still means that i have depression, anxiety, and a dissociation disorder, so the winter months definitely bring worse seasonal depression for me too. with that in mind, how the hell do i prepare for this? the first anniversary, the seasonal depression…. i got through the ACTUAL event last year, so i should be able to be just fine, but im worried. is everything going to be okay ???