Personal general tip I'd like to share with you: if you go for a winning strategy (Mill in this case), pick only cards that work together towards it. You're playing with a lot of cards that don't mill at all:
Bonded Fetch,
Guard Gomazoa,
Telepathy, ecc. You should really think about each card you included that doesn't mill. Do you really need it? If the answer is yes, why? Being a good card is not enough.
Down here there's my Mill deck, hoping to help you. It's not competitive, but it wins and could help you think a bit better on your deck.
As second personal tip: Mill is a boring mechanic imo. It doesn't interact with the board and it wins pretty much every time the same. Among my decks is the one I enjoyed playing the least. I have dozens of deck ideas on my profile page, check them out.
https://deckstats.net/decks/88072/1600763-mill