RE: Hill Start on manual 6 speed
Do you mean the Mazda had a hill start assist feature and it worked differently or you learned how to start on a hill without any sort of hill start assist and don't need the computer's help?
If you don't need the computer's help, then disable the hilll start assist feature by paging through the personal settings with the steering wheel buttons. Directions are in the owner's manual on how to disable it.
I don't need the HSA feature but my wife wants me to leave it on for when she might drive the car. So it does get annoying at times. FYI, the grade needs to be 7% or greater for the HSA to be active.