Yes, Detailed Surface Scanning (DSS), will earn you more money, I mainly DSS Earth Like Worlds, Water Worlds and Ammonia Worlds, they will fetch a nice penny. The bubble, as you know, is the heavily populated area you started in, everything outside of that, is non-Bubble

. Once you get around 500ly outside of the Bubble, you may start too find systems that have not been discovered yet.
If you search the galaxy map for Colonia, it is a system in a region that has beome known as Colonia, it's around 22,000ly years from the Bubble in a north, north west direction. Not far from the centre Sag A*
It sounds to me as though you hope to go out, find some valuable stuff to scan, then head back to the bubble to cash in your winnings. I think a lot of people do this and they discover on that trek whether they like exploring or not.
What you could try is maxing out your jump range (as you were) pick a point outside the Bubble, say, 1000ly away. Don't stick on 'flat' route. remember, space is 3D so you can head up or down. Once you get to your destination, have Full Spectrum Scanned (FSS) each system and DSS's any valuables you find, pick another location, around 1000ly away, (you're going to make a triangle shape), do the same, arrive there, then head home. A round trip like that will earn you some nice coin, get you used to the tools. It's long enough to make money but not that long that (if you find you don't like it), there is no end in sight.
You get home, roll in your cash and decide what you're doing next