Hevelin have you tried Elite
angerous? It's got the whole Milky Way galaxy out there to explore with PvE and PvP should you want to do that. Also has a module upgrade system and crafting via the Engineer contacts. It can be quite slow paced, but I really enjoy it. I'm in my Lakon ASP Explorer about 15,000LY towards the Galactic Core atm passing from one Nebula to the next while plotting a course to Saggitarius A. You'll ideally need a joystick for it, but people play it perfectly capably using mouse and keyboard.
Just putting these here for you to watch, Guardians has some pretty awesome updates expecially for exploration with the new obelisks popping up.
https://www.youtube.com/watch?v=iojsbuOzEuQ
https://youtu.be/7owJKhxaqOQ - Obsidian Ant, probably the best community contributor worth following. He has his own station named after him in the Pleadies cluster in Maia if I remember correctly.