Butterfly is only broadly related to Btwist (they share a takeoff and rotate on the same axis at least). You'll need an upgrade to your inversion and power, and most importantly you'll need to do it in a way that keeps you landing safely without those hands shooting out involuntarily to catch you every time! Skip the hands, head directly toward the finished aerial without crashing.
Butterfly twist is actually a relative of the forward-rotating webster. This inversion is needed both to reach the horizontal axis, and to return to standing when you're done. The action in this flip is the better pre-requisite skill for building a Btwist, since most of the time you'll hear the same thing: "I can finish the twist, I just can't get the landing." Sound familiar?
Spoiler alert: it's not just about the twist! First step: half a Btwist. It's about controlling a takeoff that brings you to the horizontal plane, and upon completing the twist, returns you back to standing upright! So what exactly does half look like, how do you learn it, and how does it become a whole Btwist? Oh, and don't forget we're building each step without crashing, while addressing inversion along the way.
Bundles of walkthrough videos for learning tricks, composed of skills, drills, and combinations.