Hi @SandeepMaganti,
Next steps should be made available to you once approved, including documentation on how to implement (basically you will get access to create a new type of integration and OAuth credentials to initiate flow to get a token, then how your app is structured and works is up to you, similar to other OAuth integrations - it won’t be a lifecycle-based SmartApp that is documented, which is specific to ST mobile client install flow). You should work with developer support for additional questions if/when approved (I and other ST staff will monitor and contribute on this forum as time allows, but for official support your best bet is working with developer support through their ticketing process).