How to let users choose their availability (Simple version for free)?

Need help Database
1

I’m sure this is best as a database solution since the date/time picker doesn’t do what I need.

To visualize what I’m looking for, imagine how you’re able to choose availability on certain days on Calendly. I want to do the same so people can schedule time with others (without linking a Calendly or calendar in general).

Is there a simple way to let users select avail:
Monday: 1-2pm; 3-3:30pm
Tues-Sun: etc.

Then users can book 30 minute slots within that availability?

2

The plugin that page is built in is not free but covers your needs!

3

I’ll keep that solution in mind, but I’m interested in figuring out how to build it instead.