Clean up code

[wsloth]

I'm an absolute dart and flutter beginner and can't really tell whether some things are good or ugly. But I have the feeling lots of code is badly written. Feel free to refactor, clean-up and improve where possible!

[Meghwantsingh]

Hello, I'm new to this but I would like to try .So pls tell what we have to do in this.

[wsloth]

Hi @Meghwantsingh, I'm also new to this so I'm looking for a more experienced flutter developer to help give pointers on where to improve. If you want to pick up a new feature, you can take a look at the other issues in this repository. There's some smaller features listed, and you can also contribute a new feature if it matches the app.

[BhuvanAde]

Hey @wsloth, I believe I could help you with this.