Recommendations on sex toys for men

I’m pretty new to sex toys and I wanted to get some advice on what to buy, I think I want something that vibrates, I’ve considered a vibrating cock ring but I was wondering if it would be possible for a vibrating cock ring to give me an orgasm and if so which kind? Or maybe something completely different that you suggest would feel great and maybe make me ejaculate, I also wanted to know if there was something that I could wear in public that might make me ejaculate and be controllable so I could try not to react while wearing it. Any advice would be greatly appreciated

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