How do i improve my deck?

ive gone through it many times and want ti make sure there are no suggestions people have before i get it,

https://archidekt.com/decks/10710440/casually_turtle_surfing

ive tried to keep the budget somewhat low, i already have the fetchlands and some of the more expensive pieces, so for this reason im not really looking for the obvious but expensive suggestions like mox’s and other fast mana like ancient tomb.

that being said if there are suggestions for better mana rocks im all ears.

primarily looking for strong synergies im missing, or just better alternatives.

like i recently found [[scrollshift]] instead of [[blur]] which is just a straight up upgrade.

also any nice infinites or something im missing.