Finding your h-index in Google Scholar requires two things:
This will bring up a screen that shows the information Google Scholar has about you as an author. Use the pencil icon next to your name to add personal details such as work affiliation and email address.
This screen will also show a list of articles Google Scholar has associated with you. To add articles, click the + sign by the word "Title" and then "Add Articles."
A checklist of articles that could have been authored by you (similar name and affiliation) will appear. Check off those that you have authored, then click the check mark in the upper right corner.
Google Scholar will immediately update your author profile and wil now show you your H-Index, as well as other information.
Accessibility and Accommodations