You could go with Webflow. In combination with Memberstack and Calendly or Vectera you can link stuff together pretty much without code.

With Calendly you can do live-scheduling and hook it up to any a calendar and do some more automation with Zapier. With Memberstack you can do quite a lot with profile/login, dashboards, private pages, access to specific (locked) content, including payments/subscriptions, which might already suit your needs.