Can I claim school supplies and clothing if they were a requirement?

Any fees or expenses which are required for enrollment or attendance at the school are qualified education expenses and can be used to claim the American Opportunity Tax credit.

If you are a dependent it’s usually better for the parent to claim the credit.

Q. Can I claim school supplies and clothing if they were a requirement?

A. Yes.  Qualified educational expenses (QEE) include tuition, fees, and required "course materials".  Everything you described meets the definition of required course materials for nursing students. That assumes "clothing" means uniforms.