I will start with what a VC asked me: do you have a background in education - specifically in the space you want to develop?
Is your application meant to target students, teachers or parents/ guardians, school administrators or home schoolers? Is it STEM-related?
The questions I ask are some of the driving factors on how you develop the application, how you develop traction successfully and quickly.
As a finance professional, you should be aware that one can not create a business plan around an idea. Investors, even at seed are focused on proof of concept and not "it's a great idea". The financials in your business plan must be straight out of your imagination as your still ideation.
If you lack the requisite educational credentials to add value to your application's development, add a person with the requisite credentials as a co-founder - first.