I remember trying this game once, but I found it a bit depressing. It was too complex to keep me interested, I felt there were too many numbers to take in, running out of fuel with every trip,
I think I've spotted your problem. You'd be in danger of running out of fuel if you're uninterested in the numbers (particularly that of the fuel gauge)
I see where you're coming from though. It was a massive and complex game for its day. I remember it took me about a year before I was even able to fly into a star system and successfully dock at a station. (I was like 10 when it came out, gimme a break!)
For me, it was 90% reading the tutorial that was in the first few pages of the manual (LOL, Sue Cripple & Sneer

) and 9.9% trial and lots of error (travelling to Alpha Centauri was NOT fun) and 0.1% hoping my hyperdrive wouldn't misjump AND break down leaving me stranded a few light years from any star system at all. All in all, after about a few days of solid gaming I was literally flying. In my local Star Trek club, where they had computers running X-Wing and Frontier: Elite II, I remember seeing one person struggling to even select their target destination.
Bottom line: read the manual. Not only will you pick up the basics, you'll probably find some other tips and tricks you won't see when you do it yourself.
[Of course, what also helped was that I discovered the Stardreamer Brake bug by accident (whereby you get to a destination faster by actively accelerating to your destination under manual control while setting the time acceleration to maximum speed, hoping you don't run out of fuel in the process, and keeping your destination in the crosshairs, then just as gravity is about to cause you to miss your mark, reactivate the autopilot and bingo: you're there!) which certainly helped my missions a lot due to my actual ignorance that I was exploiting a game-breaking bug!

]
And then I'm expected to buy and sell slaves and narcotics... too nasty.
You weren't *expected* to do anything in Elite or Frontier, that's sorta the point.
Yes, you could do highly illegal, morally repugnant (and entirely
fictional 
) things in the game if you wanted to, but it was difficult and the police in local star systems would hunt you down if you were caught.
Or, in my case, start breaking the law once you were rich and powerful enough and had improved piloting skills to both buy off your fine AND slaughter the police Vipers.
You could also work for the police, help find missing persons and make an honest living trading in water, or mining. Too nice?
Well, mining using the mobile minng machines was somewhat limited by the fatal game-crashing bug which prevented me from leaving any system with a MB4 whittling away on one of its planets.
As for missing persons, I always helped them get away.

The person looking for them was usually some scumbag with an ulterior motive, and I hated seeing them try to march into one of my ship's passenger cabins saying "[xx] is coming with US."

Plus, it was often more profitable to just help the passenger get away and then face the consequences of the pursuer posturing in their fighter craft... sorry, make that the
smoking remains of their fighter craft.
The other fun thing to do with the missing persons missions of course was to carry the passenger to safety, then if someone was looking for them later, tell them the truth and send them after them, knowing that I've got both parties' money. I'm just plain evil that way.
