Succesfully added player character with basic interaction.

Quite a pain, but I got simple low poly asset pack from the Unreal marketplace. A bit pricey, but oh well. Had to retarget the characters, so I can use some placeholder animations for now.  On WASD player can run around first port station, can click on other characters (with outlines).
When player clicks on a "vendor", demo UI appears. Most of work went to interfaces, so I can easily scale the game in the future. But now I have something to start building upon.