I suggest that you start small (one student) and then see how that goes. If it works and you are comfortable with the current state, consider accepting another. (see below)
At the start, I'd suggest that you select only people aligned with your own research interest. A law student might fit, or not, depending on their ideas and yours.
Finally, I'd suggest that you evaluate them in a face to face discussion in which you explore their ideas as well as their background. You don't want to do too much or too little for them. If they seem serious and have some idea about a topic, even if not well-formed, then consider them. If they seem excited about your suggestions rather than any idea they might have (as not all do) then consider them. You probably also have access to their academic record. If so, look there for alignment as well as seriousness of purpose.
If neither of you have suitable (and compatible) ideas for a research topic, then you should probably pass them on to a senior colleague. This happened to me as a student and worked to my advantage.
Give them a warning, that as an assistant professor there is some risk to them. You are inexperienced at this and your first order of business is getting tenure for yourself.
However, take some advice from local faculty and administration about their expectations. Try to meet them to enable your own chances for getting tenure.