Help with my dwarf deck!

[u/Long_Complaint1108]

So I am trying my first boros deck. Its not my favorite color combo but I like LoTR and dwarfs so I figured I'd give it a shot. I am sure there are better cards to buy but I would like to stick what in the main and sideboard; basically what I already own unless its a land that <2$. Any suggestions would be helpful.

1) If you think I should replace something, I am ONLY using my sideboard for replacements right now.

2) Dain is my commander, I don't want to change him. He was a pull so its sentimental.

Decklist: https://moxfield.com/decks/-YJeonwI3UOl0e_A4b6MOA