Not sure what isn't loading or working for you Vuldan, but perhaps if you updated from an earlier build/etc there is leftover stuff from before that is causing problems. If so - I would recommend a remove/reboot and download the new installer from the website (vs upgrading from earlier build).
Moving around in the PU (Persistent Universe) and navigation has changed quite a lot and there are a bunch of keyboard/mouse controls that have changed from earlier builds. As 3.0 is brand new, most of the how-to and walk-thru's are not going to help much (unfortunately). I will keep my eye out for some nice video how-to's but for folks just getting into Star Citizen, it would probably go smoother to be in TS/etc with folks that have some experience with things to walk ya though some things together (faster learning curve).
Some basics though:
After clicking "Universe"
I would think the descriptions they provided would help, but some folks think you go to your "Hangar" to log in. Currently your "Hangar" is to pull your ships into a single-player "garage" so to speak so you can climb around and change its weapons loadout/configuration. You can still configure your ship in the PU or the "Arena Commander", but the "Hangar" is single player only (currently) where you can do this.