r/Bujinkan

Hi, next week I’m going to try bujinkan and I’m very excited but also a little nervous. I’ve never practiced any martial arts, the only exercise I’ve ever done is weightlifting when I was younger. I’m 30 and I’m not in very good shape right now (overweight) so I’m worried this could be a hindrance…Also, entering a dojo where everyone knows something and I know nothing can be a little overwhelming and I’m scared to feel out of place. Anyways, do you have any tips for a beginner who never practiced martial arts?