This seems like an interesting deck but you could probably use less of the one drops and try to focus on some of the other main ideas that you have going such as ramp and making big creatures.
Nissa, Vital Force may also be a good addition if you wanted to put a different planeswalker in this deck. You could also throw in a
Rishkar's Expertise which may have some good effects with the large creatures that are developing. There may also be room for some instants that can protect the creatures that you have and potentially make them bigger.