To publish an app on the Google Play is a process that will take some work if you are new to it. We recommend you set aside at least a day to go through the submission procedure.
Here are some of the central Google documentation pages to get you started:
The web is full of information and help for how to submit apps to the App Store. One example is this publishing guide from Ionic.
To help you prepare your Evothings app for publication, we will add more information to this page. Stay tuned!
You are also welcome to ask for help at the Evothings Forum.