Read this please User Interface Design For Programmers - Joel on Software and A Summary of User Interface Design Principles and think about what your program is gonna do and how you're going to use it (in terms of screens and buttons), not if its going to use sqlite ...

Also, when describing how it should work use lists , and then use paragraphs to support those list items (like headings), its like having different pages. Once you have pages/lists, its easy to see whats missing; If you find yourself having at most 1.5 list items (like I perceive in this case), you need lots more

This is what I perceive

1. radio button to choose action
2. I/O on action page
3. ...
4. profit

My suggestion, actions are submit buttons (triggers), exclusive options/choices are radio buttons ; you want to use buttons or hyperlink or submit buttons

minimalistic is a good thing, it means essential :)