You're probably overthinking it - and it's not just you. This happened to me when I first played GalCiv2 ("Ok is this guy out of moves?" "how come he can only move once? Asteroid field? Is he gonna die?", and so on). The thing is, you don't literally, at all times, have to be "doing" anything. You can station a guy somewhere, have someone wander carefully past those hills, do a quick budget and figure out where you want your next town, whether you want it for caravans or food or whatever else.
At no point during that should you worry that you're not "doing it right" if the turns aren't all being 110% maximized. Sometimes I slip too, (send out a scout and forget that I've only told him to go so far for a couple turns), but in the long run these things make little difference.
One thing to keep in mind? Agenda. After you've gathered information about how your cities get built, how your armies get raised, all that stuff, think about jotting down a list of things to remember. Refer to it before clicking "End Turn". It might look like this:
- Find natural borders, the limit of expansion. This includes other national boundaries.
- Find a means to make money, including the expansion with another town for trading, as well as reaping from reward tiles.
- Acquire a production of (Materials).
- Get (Number) of troops to support (Character).
While your turn is still active and you have moves, move in the direction of a bullet agenda. Might help you feel more organized.