I agree with Damian. Learning one tool makes it easier to learn another tool. But there's one thing to observe - I don't think that designing in Webflow and transfer over to Bubble is going to help, unless you master Webflow, otherwise I'll add an extra layer of complexity. Have you tried some import/export tool from Figma for instance? Also there are some tools like https://madewithframes.com/ that help you with basic layouts.

@Chidi Unamka that's what I think, bc Webflow has similar concepts, but the tools aren't exactly the same nor the same behavior and presentation, so it can make things confusing.