From one newbie to another, I can only offer you limited help, but I'll share with you what I have learnt.
First off what is this "good picture" that everyone talks about, what defines a good shot....
1. If you are comparing your shots with pics that you have seen taken with a D3 and a 1K lens, you will never be able to achieve the same results no matter how hard you try. You are only as good as your equipment. When I bought my Sony A200 with the standard kit lens, I was posting portrait pics for comment, and the response was always that the pictures looked soft. However, I know understand that this is a common problem with the lens, and it was not really anything major that I was doing wrong. I bought a Minolta 50mm F1.7 on recommendation s/h for £88, put it on my camera, took some shots exactly as I was doing before and the improvement was huge. Nice sharp images, good colours with good bokeh to boot....

Best money I have spent so far.
2. The experience of the photographer.... I met a guy purely buy chance while taking a few shots in the park, he also shoots Sony. We got talking, and he explained to me some of the more basic things that I was missing, I.e white balance, ev, dynamic range, day light flash. With his help I was already shooting better within minutes. He was also shooting with a Sony
A200 which is an entry level camera, but over me he had knowledge of film 35mm shooting and made me realise what my camera was capable of. But more importantly what it was not. Therefore, you shoot within your limits.
3. Photoshop et al, this is another very weak area for me. My knowledge is still very little. However, I have a friend who has started to help me get to basics with it. I was truly amazed at how he took a fairly "ordinary shot" and I use that word liberally.... Spent five minutes max on it, and I ended up with something that I was really chuffed with it. Therefore, the end result was there all the time, I just did not realise it, and more importantly how to achieve it. Now with simple tools like sharpen, brightness etc my final results are much better. A lot of what we see and love on these forums are from guys with good knowledge of both taking shots and pp.
To conclude, I have found that trial and error is the only way, I was afraid to use buttons on my camera for fear of not knowing. This is off course, was wrong..... I have even changed settings so far and not known how to get it back, so needed to reset the camera to factory settings:bonk: The beauty *** is with a DSLR, you just simply delete the many hundreds of shots that do not come up to scratch and you are left with a few keepers
Hope this helps
Regards
Paul