Hey there, @Erika41510 - great question! Firstly, check out our New User Guide - it’ll def prove helpful as you get used to the platform!
Unfortunately, there is no one-click way to seamlessly share single-use links from Calendly via Gmail. You would need to go into Calendly and create a single-use link, then go back to share it. You also cannot default all links for an event type to single-use at this time.
What you can do is consider using One-Off Meeting types when you have this need. Check out the link to learn more!
This Help Center article goes over creating and sharing one-off meetings from the Gmail integration, as well as other helpful tips for this use case/your goals!
I hope this helps!