Groups in South East UK

Hi all. Been keen to meet up with similar folk with similar symptoms in my area (West Sussex). Lots of the sites and groups just look so old fashioned or staid and this one just had a bit more buzz. Bit nervous about joining a group full of very different people to me but would love to share a beer, some food, maybe even a walk with people who understand or need help themselves. I’m not great with social media so does anyone know any really great groups in this area?