It'd probably be better if I left this to those who used to be on coffee and have found a substitute....
But in case it helps anyone: One of the most powerful wakers seems to be early morning daylight, looking to the sun, studies and experts are now saying, to get cortisol up and the circadian rhythm going. And again in the afternoon at latest, cos that sun increases the body melatonin build-up to make sleep more efficient. And for me this is making a big difference.
For more I'd try opening my blackout blinds before getting up (yeah, I'm up about once every hour or 2 every night). Using an alternating or cold shower.
And of my many supps for energy and alertness my personal best bets are ginkgo, eleuthero, and glutathione (or NAC), plus magnesium types it seems to me very individual which ones are better for evenings and which for mornings.
Don't know if I'd try D-ribose in the mornings (that's if simple sugars aren't too big a problem).
The only thing close to the (bad) effect caffeine has on me is taurine (= alert and shaky-jittery), but that's a paradox reaction, cos actually taurine is used/seen in energy drinks as balancing antagonist. I also have several things that work paradoxically for me, like theanine, magnesium glycinate.