Yes — classes taught to Pungra's standard are built to be scalable. Every certified instructor is trained to offer modifications throughout the session, so lower-impact versions of each movement are always available.
Your only job in your first class is to show up and move at whatever intensity is comfortable for you. Don't worry about keeping pace with more experienced participants; a well-run class has people at very different fitness levels in the same room, and that's expected.
If you have any underlying health conditions, read "I have a health condition — is Pungra safe for me?" before your first session.