Hi @zaheer20 ! As you are new to the community, when you get a chance, please introduce yourself here.
I’d also encourage you to add a real picture as your avatar because it helps build community!
For your question, the ODK docs have some great intro components that you may want to start with here: Trying Out ODK-X Survey — ODK-X Docs for using the tablet tools and here: Getting Started Building an Application — ODK-X Docs for getting started building an app.
There are also these training materials (for a slightly older version but should still work in general): Community contributions to upcoming ODK 2.0 documentation refresh - #6 by elmps2018