Trying to make a Merfolk as fast as possible and flow much better. At the moment I'm having a hard time getting the right hands because I heavily rely on a few cards. Currently my deck is all blue and if I were to add white what cards would be a good addition?

Also my Wanderwine Prophets is on Maybeboard because I have a hard time getting the 6 Mana that quickly.

Very new to deck building so any help would be great!