I have started playing again after perhaps 8 months away, i certainly have logged on in between but always notice that what ever i wanted to do would require 10 or 15 jumps from where i was or would take around 40min to call the ship i needed...and then I logged off. I also would never see more than 1 mate online.
From the 3 hours you have, discount 30min to 1 hour for travelling or setting yourself up for the activity or getting mates to connect, prepping in ED takes ridiculous time unfortunately.
Tip 1: With any updates/ content added, do not rush off to be a 1st adopter, as any future changes might need you to re-do it all. looks at all my older legacy engineered non-god-rolled modules still to re-engineer at the engineers if i want special FX So guardian tech, engineers or any new stuff leave it alone for about 8-12 months before you get stuck in for FD to indicate or make changes, this saves so much time and frustration as they make it easier or quicker to do. I still have not multi-crewed on my or someone else's ship ever, still not explored or moved more than 1k LY away from my starting system +/-1700hrs on record (non-steam) since end 2014, exploration is not ALL that yet for me and broken FSS confirms my decision to not do it yet.
Tip 2: Before i log on next time i try and decide what i would like to do and call over ships or move to that system the day or night before I log off.
Tip 3: I get easily distracted in-game by trying to research with 3rd party tools on a topic or component i need or what is needed for that blueprint at that time etc, do this when you are offline beforehand, so that actual game time is used for completing missions or entertainment.