Please check email from your instructor, LMS folder (D2L, Canvas, Blackboard, etc.) or syllabus to find the registration link for your course. Shoot firstname.lastname@example.org an email if the link doesn't work or you can't find it.
Next, log into PitchVantage web version (where you create your practice sessions). It works on laptops (no tablets or phones) with Google Chrome and Firefox browser.
Important: a small window may pop up asking for your permission to access microphone and camera, click Allow.