Keep shooting, keep learning, and keep assisting your pro friend. Get some good books, and study them.
Taking college photography classes doesn't mean you have to go back for a degree. Take them as you have the time and the money. Classes aren't just about the technical know how, they are also about completing assignments on schedule, talking to other photographers, and looking at their work, using new equipment, hearing different opinions, and so on...
Look at photographs, and not just in books and on the web. Take the time to visit galleries, museums, and shows and look at the photos (and other art). I took lots of college classes, professional workshops, worked at a pro lab for years, and I've read, and read, and read some more, and I keep on reading about photography, but the study that I've found most valuablre has been looking at lots and lots of real prints of photographs. Not just famous ones, but local amateurs too. I think this is an aspect of photography education that many photographers neglect.
As for my camera, I have had nothing but good luck with it so far, (again I haven't had the experience many of you have....I only know that here, our local police use the same camera, and said that it is excellent. I have taken a few pictures with it that are just phenomenal (if I may develop an ego for a moment)...my chickadee avatar is just one of the ones people have said they liked.
Your camera is a typical point-n-shoot style digital camera for it's price range. Most reviews I've skimmed rate it average compared to similar cameras; not as good as some, not as bad as others. The requirements for police evidence photography are much, much less than the creative photographer.
The more you learn, practice, and develop a passion for photography the sooner you will most likely be dissatisfied with your camera, and your early "phenomenal" photographs, but that's okay, because it just means you are reaching higher. I have my favorite photos from my Photography 101 class ten years ago hanging in my darkroom. Back then they were masterpieces; now they make me smile, and demonatrate how far I've come. They still have a place in my heart, but none get hung in my living room, let alone somewhere in public.
Selling your landscape and fine art photography is easy to get into, because the client is purchasing a finished product. They know what they are getting, and they are either willing to buy it or not. Check out art and craft fairs, auctions, etc... Many people even sell their work on
Ebay! Put together a portfolio of a doxen matted prints, and see if you can get them hung in banks, hospitals, coffee shops, book stores, and so on.
Selling your services as a photographer for weddings and portraits is a little trickier, because the client needs to place their trust in you before they get the finished product. I've think there are three things most clients consider important: portfolio, credentials, and price. With one client/project a great portfolio may matter more than a full resume, with the next credentials and experience could be manditory, and there is always someone that's looking for a bargin. Creating the perfect balance of all three insures you'll get jobs.
Good luck, and keep shooting.