Whatever pitch prop you have you need to go down at least four inches of pitch possibly six inches.More if going to a four blade from a three blade. You have to get those rpm`s up or it will never plane correctly.Also check the height of your motor setting.Your anti-cavitation plate should be level to no more than two inches above the bottom of your hull.When trimmed all the way down.
Down four to six inches of pitch or more?
No way. How can you guess without knowing what rpm it's running at WOT on plane?
And ... The OP hasn't even tried to get it on step with light load.
