I’m not saying I don’t “fear” the Slammer, it is still a good weapon. I’ve just learned a little bit more about it and how to defeat it so even when fired upon, I’m not panicking straight away.
As for joining a group, yeah, some groups close their recruitment from time to time but there are a few groups out there that hold “open” flight sessions so you can probably join those to get a feel of the group and how they fly.
IMHO, flying this sim lone-wolf style is doing yourself a disservice.