I've just dappled in various martial arts, was taught informally to fight by older relatives and worked in security for a few years. I make it clear to students that I am not an expert in anything and if they wanted to excel in a particular art, say boxing, then they would need to join the appropriate club after perhaps learning the basics from me.
There is a common phrase "the blind leading the blind."
If you don't have the training yourself, it's very difficult to impart meaningful training onto someone else. There's a big difference between someone who has a black belt in Judo and dabbled in a bunch of other arts, or someone who has trained several arts for a few years each, and someone who has just dabbled here and there and then spent time on their own.
It's been widely discussed that it's very difficult to learn martial arts outside of formal classes. I ran video classes for TKD during COVID lockdowns, and it was very difficult to teach the details over video chat. It was impossible for me to give students the feel of the technique when I wasn't with them. BJJ black belt Chewjitsu had a similar experience as the student. He and his wrestling buddies watched UFC fights and tried to learn BJJ from them, but had a very different experience when they went to class and felt an experienced BJJ fighter do the same moves on them.
Formal training also helps prepare you for teaching, because you have some idea of where to start and how to build fundamentals. This is true of the things you like and the things you didn't like. For example, I like what my Taekwondo Master taught me about how to teach beginners, and that's something I learned the right process for under him. I did not like how he approached the more advanced levels, and I would teach my advanced students very differently. This was over the course of several years of seeing what teaching style worked and what didn't, both as a student and an instructor.
Now that they don't believe in pacifism any more, some of them want to be brought up to speed with what they would have learned in a more martial culture. As someone of a different background, I think this is something positive I can contribute to the community.
I get that you want to contribute, but if you're honest with yourself - how much is there for you to contribute?
I'm not saying that your experience isn't a benefit. But if your goal is to introduce people to a martial culture, your best bet may be to introduce them to someone with a stronger foundation in a martial art.