To echo what @Hyperbytes has said, Bubble uses Workflows to perform tasks. Wappler uses server actions. Not entirely different but enough to have to learn how they differ from each other. To be really honest with you, if you have little or no-code experience, you will not learn Wappler completely in 7 days.
If you start with Bubble and then decide to move to Wappler, you cannot transfer your app. You will need to start again from scratch.
Bubble and Wappler both have their pros and cons but I believe choosing Wappler (although the higher initial cost) will give you a much better chance at scaling your app in the near future.