Hi @readiup6 
Apologies for the late reply.
Currently, you could use the Multi-select element with the Allow to create option enabled here:
You would also need to restrict the number of options a user can select by adding logic to the element (a little bit of work but doable).
For the binding side of things, the videos in the user docs should help.
We are in the process of updating our documentation and videos with the new UI but the element will work the same way 
Does that help? It’s not the most straightforward thing to do. Don’t hesitate to let us know if you get stuck. In the meantime, we will work on the UX of the select and multi-select elements to make them more intuitive.