One of the problems with your post is that you are asking questions that are way too broad. Most people won't take a chance to answer and put in a lot of effort that could well be a waste of time. Better to ask one specific question at a time.
My initial advice would be to learn/understand the "exposure triangle" (google is your friend).
Learn and understand what effect you get when you change the aperture setting.
Learn and understand what effect you get when you change the shutter speed.
Then you will be in a position to experiment with Av / Tv / Manual modes to achieve the images you are looking for. (and if you don't know what Av / Tv modes are, then again Google will be your friend. You will then be in a much better position to ask specific questions and get some quality feedback)
However, your other post:
New to forums. Hoping this site will be useful. Anyone know of any websites that offer reasonably priced backdrops, floor drops, lighting, etc? Looking to build my studio. On a tight budget. Now realizing how expensive photography can be!
This seems at odds with what you are asking in this thread. If you are "looking to build your studio", you should be well past what this thread is asking for.
Your Facebook page, with your prominent watermarks is, again, at odds with this thread. If you really are just getting "a feel" for camera settings, I'm curious as to why you are watermaking the way you have. There just seems a mismatch?