Low blood pressure & circulation

[Asphyxia]

So i have low blood pressure where i feel like i might faint at times, ive read about coffee and how the only downside of it is vasoconstriction, wouldnt that be a positive for someone like me or should i still strive to lower my blood pressure further
Same goes for hot baths, they are beneficial for peyronies in theory but i feel weak and dizzy if i get up and i can faint so i have to wait till i get cold, it feels like my blood circulation is decreasing, not improving.
Caffeine seems to increase both heart rate and blood pressure maybe cannabis too.
Theobromine and hot showers lowers blood pressure, not sure what to do

I know we need a fast circulation but what does that mean? High or low resting heart rate? Low blood pressure? What if its too low? What about blood viscosity?