lvl 80, what now?

so yesterday I finally got to lvl 80 with my engineer. I choosed the mechanist as my spec. what should I do now? I am a lil bit overhelmed right now. I have every expansion besides the newest one. I was thinking about just doing the story content and leveling my mechanist?

EDIT: thank you for all the tips and advice! and great, now I wanna try the holosmith spec, I am going to cry hahahahahaha