Hi! I signed up for a beginner BJJ subscription at a gym near my place but whenever I attend classes, even just during warm up, I get nauseous and light headed to the point that I’m on the brink of vomiting. I also cant keep up during sparring. 1 min in and my body is exhausted.

Any tips so that I can avoid this from happening? How can I increase my endurance? It makes me want to give up on BJJ altogether since I still have planned activities after my gym sessions.

Brief bg about me: Im a small 23F with moderate lifestyle. everyone in the gym is bigger than me. Im usually wfh hence why I wanted to have some sort of activity after work