Introductions discussion

Hi everyone, I’m considering chastity and handing over the key to my girlfriend, but there are a few things that worry me:

1. I masturbate frequently and would prefer to stop, enjoying sex solely with her. However, she is vanilla and has never had an orgasm. I’ve tried pretty much everything to help her cum without success. We have essentially stopped having intercourse due to an argument. We’re trying to reconnect, and I thought chastity might assist, but I’m not certain. The fact that she doesn’t reach climax makes me feel less manly, though she says she is fine with it and asks me not to worry. It seems we’ve both lost interest in our sexual relationship, and I don’t know if chastity will help or make things worse.
2. I am submissive only when it comes to sex. I’m working toward a manager role and work with many women. I enjoy being the one in charge. I want to remain in control of our daily life too, but I fear my girlfriend might try to shift us into an FLR (Female Led Relationship). I don’t want her to use chastity as leverage against me day-to-day. Given this, is it worth trying out or will it complicate matters? Any input would be appreciated.