fluxadecimal

You might run into trouble with your mana curve; it's very top-heavy. If you don't have smaller spells to keep you alive early, you could be dead before you can cast anything.
You can definitely take out a bunch of those lands. You don't want more than about 24. It'll set you back if you draw land when you need spells. Two-color lands can go a long way, so you can make different colors from the same card depending on what you need to cast.
I think you can safely take out the Dragon's Claw, or maybe sideboard it for when you're playing against a red deck. On its own in five colors, it can't gain you that much life.
The Belligerent Brontodon might actually be hurting you - your creatures seem to have equal or higher power than toughness, so with Brontodon on the field switching things around, they could get weaker instead of stronger.
Make sure you've got lower-cost cards in there. If you want dragons and dinosaurs specifically, you can check a search engine like Scryfall or Gatherer for exactly what you need.

Thanks for the advice! I definitely need more answers, yeah.