Im think about starting a startup app and another tech idea I have. Any tips on getting started?

Question

I currently have a structure of how each idea will function, what market will be targeted, people who will be interested, cost, possible revenue but no physical

Should I file a provisional patent to protect my idea, before starting to looking for investors?

Should i make a mini prototype of how the app will function or will a specific description be enough to persuade investors?

For those of you who have started a business, what were the first steps you took in starting it?
Any tips?

Thanks :-)

Answer 1

first make a prototype , start a beta program and fix the bugs

Answer 2

What Dhruv said and I highly suggest diagrams or black boxes or whatever you want to call them. It is much easier to design complex systems with at least a relativily outlined plan, functions and approach (this is focussed and very strongly motivated in university and to date I know of only one person who could succesfully design complex systems without these)