Dredge is the obvious thing to fuel graves, but loam really kicks things into high gear with cycling lands. Unfortunately we have limited options - a total of 7, of which 5 cost 2 to cycle.
Luckily we don't need to massively fuel the grave - just top it off when we're short for casting uro.
As far as getting the engine going - intuition is the clear way to go. To get there, we've got mystical, scroll, and drift. And to get those, we've got personal, sylvan, worldly, muddle, dizzy, and spellseeker. And if you're asking "would you really tutor for a tutor for a tutor?" The answer is yes, and get alllll the way off my back about it.
After we've got a draw engine and a repeatable threat, ramp, and life gain generator, it seems to me the best way to move forward is with a control deck to support it (I mean, you could go landfall or something but...it's me. I build control decks compulsively). Tutors we're good to go on, so now I'd probably focus on removal and counters, and whatever wipes we can get. Maybe a little recursion, since we can dredge into good stuff.
Finally, nexus of fate seems like a good fallback if we go too hard for too long.
Ok I guess I kinda built the whole deck. Oops. Well if you've got any suggestions lmk.
EDIT: ok, here's my current decklist. This is built off what I have with me at the moment, which is my commander cube, a stack of my most valuable cards, some cards I borrowed from Phelddagrif, and then a few proxies for the stuff that are absolutely crucial to the deck.