Thanks guys. Sorry it's taken me so long to reply, I've been busy playing and working. What I wound up doing was swapping the scanner for the +2 Cargo Hold and ran that for a while. I then finally found a way for me to make some OK credits. Well, OK for me. While doing a cargo contract in the Sidewinder, I found a trade run that I could do every time and make 300-600 per unit carried. The bonus is that I could run between 2 stations continuously like a dedicated truck route. It generally takes me between 10 and 15 minutes to make a round trip. (Thank you Ancipital for linking Thrudd's for me, it's helped me A LOT, and I have it open just about every time I jump into ED)
After running that route enough times, I was able to upgrade to the Adder which gave me the same cargo space stock that the Sidewinder had without the scanner AND the Adder had the scanner. Ran the route a few more times, and was able to get the Adder upgraded to carry 12 cargo units with a scanner, and can jump up to 17ly empty. That run is now making me about 11k credits per round trip. The downside of this route is that the cargo is actually valued at around 40-50k, and there's rarely contracts available that I can/want to do.
Unfortunately, I've been interdicted a lot more in the Adder than I was in the Sidewinder. Granted, I decided to go to other systems and see what I could get. In 1 trip, I was interdicted twice in the same SC to a station. After getting interdicted so many times, I decided to go back to my starting point for the 11k trade run. I was empty on my return trip because I couldn't find profitable commodities to get me back there for a profit and the fuel cost was negligible. Additionally, I had no fines or bounties on my head and got interdicted by an NPC (I'm still playing Solo). He took my ship down to below 38% before I was able to get out of there. In hindsight, it looked like I should've just let him destroy me because the insurance replacement cost would've been cheaper than my repair bill (about 6k for insurance and almost 8k for repairs).
I'm liking the Adder a lot more than the Sidewinder, despite the Adder's slower speed and maneuverability. IMO, it's a better looking ship inside and out, and is far more profitable for my purposes. The only thing I don't like about it is that it sounds like a broken down wreck when it drops from SC.
While I'm doing cargo and trade runs with a bit of exploring on the side, I do intend to get into combat later. Right now, though, I think I'll "grind" the Adder to get it upgraded even further, and continue to "grind" it until I can get enough credits for a decent dedicated combat ship and get it ready for action (along with a few extra credits for insurance costs). In doing this, I plan on keeping the Adder or upgrading it to a bigger cargo ship for reliable income.
Overall, I'm finding more enjoyment in ED now than I was when I first posted this.
Another question, though, is there anywhere in game where I can buy some type of different paint scheme for the ships, or are they all purchased through the online store?
Edit:
I also posted an Elite: Dangerous video. The trade run starts @ about 4:50. The first part of the video is an introduction to ED (for 2 main reasons, 1. I like the first video I post of a game to have an introduction to the game and 2. most of my previous videos have been from the other and still in development space sim and not everyone that plays that game seems to understand ED).
[video=youtube;8FTKSxS9WoA]https://www.youtube.com/watch?v=8FTKSxS9WoA[/video]