OKR tool made from CodeIgniter?

Hi,

I want to create our own OKR tool for our department. I have no idea how and where to start. I studied how OKR works, use some existing OKR tools (weekdone.com) and analyze the functionalities. I even created a flowchart for this project.

Also, I tried creating a database design but I'm worried that it won't work.

Can you give me some advice on how to start this OKR project? Can someone help me, please? I highly appreciate that.

Thank you.