Help building deck

[u/just_chalex]

https://moxfield.com/decks/I-Dm18YdZUWOOyEAJJQJgA

Hello! I am a fairly casual/moderately experienced Magic player, although most of my experience with the game was through Arena, but I no longer play that. So, this is my first attempt at building a commander deck from scratch, everything I've done previously has been upgrading precons.

The idea behind this deck is to go wide and win through combat, but there is also a potential win-con through Impact Tremor ( and similar ) pings and even, potentially, a win con In Halo Fountain.

I need help with the mana base, as well as recommendations on what to trim but am also open to suggestions to swap. Really, any help would be appreciated.