For a lifegain Strategy, I always love to see Aetherflux Reservoir, which may a bit pricy, around 20 or so dollars, but can kill most opponents if there not playing life gain. I think a problem in this deck is that there are a lot of cards in here like Bulette and Green Dragon where their effects can be useful, but don't contribute to the Life gain/Ramp strategy. Ageless Entity and cards like Ajani's Pridemate can also help out with getting creatures big by gaining life. I'll just put a list of cards that benefit from having lands enter the battlefield and by gaining life Sproutback Trudge, Ezzaroot Channeler, Verdant Sun's Avatar, Pulse of Murasa, Venser's Journal, Emeria Shepherd, Beast Whisperer, Nissa, Voice of Zendikar, Scute Swarm, Ajani, Mentor of Heroes, Ajani, Wise Counselor. Hopefully this helps in making this deck have a better win % and making it more fun and a bit more aggresive. If you still have any questions, just comment on this and i'll try to reply to it.

SpotosThank you so much for commenting! These are super helpful suggestions that I hope to phase in over time. I recently added cards like Rampaging Brontodon and Gigantosaurus in hopes of some big damage, but in my last 3-4 games I haven't even gotten the 5 mana out to cast commander before my friends have all gotten theirs and are swinging wide.

I think the Equipments will be the first to go, but what else would you recommend I cut to make room for your suggestions?

MuricanSheepdog Np, just trying to help out someone starting. The main things to focus on are the cards with effects that won't help towards the main strategy. Some cards to replace would be, CREATURES: Arborea Pegasus, Dire Wolf Prowler, Elturgard Ranger, Hill Giant Herdgorger (The problem with him is that even though it does get you 3 life, for 6 mana and a creature with no other abilities is a bit too much mana to cast compared to some others cards that can gain life), Planar Ally (not sure how much you want dungeon crawling to play into the deck, but with most of these cards, you could honestly build another deck centered around it instead of putting it into this deck), INSTANTS: You Hear Something on Watch, Plummet, Repel the Vile(even if these are removal for cards, some other cards do what they do better and are still less than a dollar in price), SORCERIES: Compelled Duel, ARTIFACTS: Delver's Torch,Treasure Chest(This may seem like a really good card, but for 3 to cast and 4 to activate, making it essentially 7 mana to either gain 3 life and draw 3 cards, or lose 2 mana in total, the card seems like it has more of a chance to whiff rather than help in its effect,((don't worry, I would have fallen for that too))). Since you said your struggling to get mana, some "ramp" I would put in the deck would be Rampant Growth, Reclaim the Wastes, Roiling Regrowth, and Crop Rotation. Those should get you lands out quickly to play your commander sooner. Some artifacts I would also put in would be Commander's Sphere, Sol Ring, Moonsilver Key (this can search out Sol Ring from your deck), Moss Diamond, and Marble Diamond. Those are the ones off of the top of my head. Sorry if it's a bit long, I didn't want to make it 2 comments. If you still have any questions, feel free to ask away again, and I'll be happy to help out. :]

If you do have a certain connection to a card, like if Treasure Chest was your first Rare and you have an attachment to it, then keep it in. Better for you to like the cards in your deck than to have it do .5% better. If you don't like the cards, then you might not enjoy playing as much. In my Red/Green deck I can't make myself take out Dragonmaster Outcast, even though it isn't very good compared to cards I could replace it with, it has been in the deck since I made it in like 2017 and has stayed in since. Also don't force yourself to try and put rares you get into a deck if they don't fit all too well, don't depend on if you put another rare/mythic in a deck, it'll do better than before(some commons can outshine higher rarities). I Still do that sometimes and after getting the card in my hand, i realize why did I put that in here exactly?"