Welcome to the forums Scotty
Nice to see more new members even in 2018. We have plenty of content on here if you're into Lemmings, most of that stuff will be available on NeoLemmix.
A lot of people say how great NeoLemmix is compared to other Lemmings engines like Lemmini and SuperLemmini. NeoLemmix is more for the people who want to make great puzzle levels where people don't need to worry about execution in real time and there are a lot of people who enjoy that aspect of the game.
However it's recommended that if you're working on content that you switch over to v12.xx.xx of NeoLemmix (any v12 is fine) because there's a big difference between working with that and v10.
If you're into multiplayer Lemmings then we host regular Lix sessions on here if you want to get involved in those, they are a lot of fun and we play new levels at nearly every session now. Just look out for sessions in the Lix subforum, there's nothing arranged at this moment but watch that space
If you're into modding then that's great because both NeoLemmix and Lix are open source and everyone is encouraged to get involved and experiment with them. The more people who understand the coding of the games then the better and stronger the community becomes
I'm also from the UK myself and quite a lot of us are from Europe in general with a fair few in the states. Nice to see more UK presence, where Lemmings was born!
Anyway if you're ever unsure about anything you can always ask on the forums or if you want to chat to some of us directly we have an IRC channel here. It's recommended to pop into the chat in the late evening (UK time) otherwise there might be no one there.
We generally hang out in there when not making posts on the forums and banter when we're not talking about Lemmings.
We're a really nice bunch so don't be shy
http://webchat.quakenet.org/?channels=lix,neolemmix