Slow bootup and other functions

So I have always noticed my PC running slow in almost all ways possible. Bootup takes forever, opening software, and just general operations seem to take longer than they should. I just need to know what to upgrade in order for everything to run smoother and quicker.
Specs:
Processor – Core i9 3.70GHz
RAM – 36GB
Storage – 931GB (SATA) & 930GB (TMax (SSD))

I figured having double storage options would increase the speed of everything, but it doesn’t seem to have any effect.