Is there any online tool where students can register for tasks/assignments? I'm teaching architecture and I want my students to select a building that they will work with from a list. When a building is selected by one student, it should no longer be an option for the others (first come - first serve).

Is there an online tool where a list can be created and students can select their object of interest, preferably without going through a whole registration process?
Our student-platform unfortunately does not offer this functionality.
Any suggestions?

Tool could be in English or German.
I found the tool "Doodle" (doodle.com) where a poll can be set up with different options to fit my needs. With this tool, appointments can also be arranged.

Here's a link to an example I set up: select architect