Tips for my avatar aang deck

Hey I have recently built my first ever magic the gathering deck, it is an avatar one it is my favorite show and I always liked playing magic with friends(I played with their decks) I built my own deck with a heavy avatar flavour but imo also maybe some optimisation pieces, does anyone have any tips for me or see any cards that u are like this shouldnt be in there and this should be in there. Also tips for mana base would be appreciated I have 4 really expensive lands in there those are proxies I got from a friend u can ignore those basically, I had some painlands instead of those. Here is the deck: https://moxfield.com/decks/xFLToyjUu0qn75AfYpZteg

Any tips would be appreciated