If you're worried about running out of time, then just abuse Chronostasis. Seriously, you will reap EP during normal gameplay, especially if you're playing on Easy Mode. You don't want to be in a situation where you're at max EP, as any more you gain is wasted.

You can get alot done in a single use of Chronostasis. Use it.

In terms of Mide Quests, there's not many you can actually fail, and those that you can fail typically inform you of that as a warning.

In terms of the Main Quests, like everyone else has said, you'll do everything with time to spare. I finished the last Main Quest at the beginning of Day Seven, and that was only because I wanted to space them out slightly and not finish two in one day. I would do Luxerion first, as it is the easiest and shortest of them. Yusnaan's quest is set-up to be completed in one game day, so set aside one whole day for that Main Quest. Both the Wildlands and Dead Dunes Main Quests can be done in whatever order, but I'd say they are the hardest two.

Don't mind asking for any advice noxy whenever you feel you need to!