OBGYN or fertility specialist first?

My husband and I have been TTC for 9 months. We’re beginning to look into <a href="https://glowing.com/glow-fertility-program">fertility treatment</a> at the year mark. Where do we start? Some of his coworkers said the obgyn helped them more because there were cysts and other things. I always thought we were supposed to see a fertility specialist though? Does anyone have advice on where to begin?