Create Small Web App with WordPress

Hi all,
I am no hero of web development and may not be perfectly aware of all the needs to build custom web apps (or websites for that matter).

At the moment I am using a software called “Scriptcase” to manage our clubs’ membership and basic financial concerns. All the data is being saved into a MySQL database and the software allows rather simple out-of-the-box applications in order to create reports/grids and forms (much like MS Access). However, user management is a pain and since we are also using WordPress for our clubs website, I thought maybe there’s a (bunch of) plugin(s) to add the ability to generate forms and grids interfaced with MySQL.
My goal is to use another framework – simpler in a way of speaking. And since I am just a hobby-person I wouldn’t have enough time to become aquainted with Angular, Django or Ruby.

Can anyone from the community share some hints or ideas?

Thank you and best regards,
Konstantin