It seems that many people in here are using calendly to have people book their calendar, and it's a good tool. But on the free plan you can only get one type and duration of meeting. So just wanted to share what I am using, and if like me you love FREE stuff, you can check out cal.com (I have no affiliation with them), you can set up many different meeting types and/or durations even on their free plan (see my example screenshot), so just wanted to share that.