Just wait for more servers OR bigger server capacity. The devs have been overwhelmed lately, it's natural to run into problems, the very first days of Early Access. I 'm also frustrated that I can't join. I just play something else until the game is accessible again
I, Ebenizer MacNiggins, although Scottish in origin, would like to answer your call to arms!
We shall throw the French off the plank and right in the bottom of the Ocean!