You could try Brain Candy caffeine-free for sure and see how it works out. The ALCAR, NALT, and L-theanine can all mildly influence dopamine and can give feelings of motivation, well-being, reward, and so on.
I would also try to get the best sleep possible since that is the trickiest part of this. Make sure you are getting blackout curtains, try to shoot for 7.5 hrs of sleep, and take magnesium, Elitepro Minerals is your best bet. Try to get sunlight or go outside as soon as you wake.
For a little kick at night, you can also try a few things. Dark chocolate (85%) has beta-phenylethylamine (PEA) which influences endorphins attributed to feeling pleasure, improve attention, etc. You can try 30-40 grams or so. It has minimal caffeine.
You may also want to fool around with the 'racetams. Piracetam and others (such as aniracetam) can have mild stimulation by influencing acetylcholine, among many other effects. They can also increase noradrenaline which can help your concentration. I wouldn’t take racetams at night, rather take them in an afternoon meal. YMMV: some people feel the effects of racetams, some don’t. Some feel them immediately (could be placebo), but some studies have showed that it can take a few days or even weeks for the effects to kick in. Aniracetam is supposed to help creativity but that is purely anecdotal, could be from selectively modulating the AMPA receptor.