lets begain your project without any problems, by using this template this project is tested , and run at android

• compiles successfully using buildozer
• run on Android without Crashing
• This template has fully functional kivymd hotreloader

you can convert your python file to android apk using google colab without any error by using this link https://colab.research.google.com/gist/kaustubhgupta/0d06ea84760f65888a2488bac9922c25/kivyapp-to-apk.ipynb . provided by blog https://towardsdatascience.com/3-ways-to-convert-python-app-into-apk-77f4c9cd55af

this pdf is very helpfull during codeing ,