How to realistically go about gaining an invite to R4E

I am very green when it comes to private trackers, but understand there are strict expectations on members in terms of seed ratios, etc.

My current setup is such that I am now well placed to seed longterm, as such I have considered how best to go about becoming a member of one or two trackers.

Initially I would like to try for Racing4Everyone - I’m really into my motorsport, but only have limited access to content via traditional means.

What are the general methods to apply in order to become a member of these trackers, or is it more or less impossible unless they open up briefly?