Introductions discussion

Hi, I am new to chastity but it seems that I am looking for something different than most people here. I have been married for over 20 years and sex has been amazing. I have a bad masterbation habit but it was never much of an issue. Now that I am late 40’s it is hurting my performance. Sex is not great for me anymore and my wife complains I am rarely in the mood and when we do have sex I am not great. I have read about chastity devices for this issue so I bought one and have been wearing it while traveling for work. I come home extremely ready for sex and it has been awesome for me and my wife. I finally got up the nerve to tell her what I was doing. She thought it was weird and not interested. She said I could try it but was uninterested and pretty turned off . I really want to try it because I think it will help us both but not sure how to approach it again. The reason I am not sure if this is the correct forum is that I am not looking for a female led relationship or to be sub. Neither of us want that. I just want to be ready and perform when we have sex. Any help would be appreciated.