I'm a first year math Phd student. I'm undecided between focusing on mathematical computer science (MCS) and pure maths, so I'm taking courses in both. To keep my workload light enough to avoid stress, I've opted to audit one of the courses in MCS. The course is not in my research interests, so I'm taking it primarily to prepare for an exam required by my program later. My hope is to just drop into classes and be exposed to material, without taking the time to do all homeworks/prepare for exams, etc.

However, I'm interested in the professor as a potential advisor later, so it has the double benefit of helping me see if that would be a good fit down the line. My question is: could my auditing, rather than taking the course for credit, be perceived as lack of interest, laziness, etc? How is auditing a course perceived in general? Do I have the right attitude towards auditing?

Note: The course is not in the professor's research area either, so not being interested in the class doesn't contradict my interest in the professor.