Dear @paul_macharia,
I am not sure about an ODK template, but there are examples that come with the sample application described here:
https://docs.opendatakit.org/odk2/survey-sample-app-overview/
And lots of explanations with examples here for how to build the excel worksheets here:
https://docs.opendatakit.org/odk2/xlsx-converter-reference/#excel-worksheets
We also did some step by step training, files here:
So between those hopefully will get you started on the transition. We often learned ODK2 by taking one of the examples and modifying as a starting point
Best,
Caroline