I’m a 26m also with more of a mild stutter. Personally, I would say that you should do whatever makes you feel the most comfortable. If self-disclosing your stutter before meeting reduces some anxiety/makes you feel better then do it. There’s also nothing wrong with not telling them ahead of time. I usually don’t make a point of telling a date beforehand because to me my stutter is not a big deal. Sure, I have difficult days with it but I also realize it’s a part of who I am and I have to be confident with it. If someone is off-put by my stutter for whatever reason, then we’re not a good fit. If I end up going on multiple dates with the individual, I will tell the individual but I mention it casually and play it off lightheartedly like it’s not a big deal. In my experience, people usually respond well to this and may even tell you about something they have or battle daily. Like I just mentioned, there’s a large chance that the person you’re on a date with battles something daily, whether it’s depression, anxiety, or something else, and we don’t often expect them to reveal that to us beforehand or right away. Dates are meant to be enjoyable; and people will pick up on the energy you give off. It might sound cliché, but do whatever feels right to you. There’s not a “right” or “wrong” way to go about it.