just a quick one.
The A75 is one of the best cheap camera you can buy today. You can almost do no wrong by buying it.
The rest of the stuff with camera usage is actually up to you. You should be trying it out with different settings and decide for yourself whether the camera is good or not, and I believe millions of buyers can't be wrong.
How you use it is up to you now. No one can tell you that. If you have any problems then highlight it in the Canon forum where the best people that can help you are.