Please visit our Getting started docs for the WebSDK, this will take you step by step on how to get started - https://marketplace.zoom.us/docs/sdk/native-sdks/web/getting-started/integrate.
Yes it is possible to test a live Zoom meeting, just make sure to test a newly created Zoom meeting and not use PMI if your an attendee, otherwise it will not let you join.
Let us know if you need anything else.
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