I'm going to repeat some of the advice previous posters have already given you, so my apologies to both you and them.
Danielle, don’t give up. It is frustrating. Some people “get it” quickly, other, not so much. In any case, nothing replaces getting a “feel” for what you’re trying to do. And getting the “feel” requires experience, which comes from practice and making lots of mistakes. Mistakes are good, if you take the time to understand why they are not successful. So consider taking a focused approach to learning. Take one topic at a time, and then beat it to death. Don’t move on until you’ve got that topic under your control and on autopilot. When you don’t have to think about it, because you’re internalized it, then you’ve got the feel.
We all have different styles of learning. Some need to see an example (visual learners), some need to hear the instructions (auditory learners), some need to read the instructions (reading learners), and some need to physically do the exercise (tactile learners). If you’re in the third catergory, then “READ THE MANUAL” works great. But if you’re primarily one of the other types of learning, then it’s not so useful. It would help if you can identify how you learn stuff, and then structure your learning efforts along those lines.
While tutoring some beginning photographers, I’ve noticed they try to change too many things at the same time, and consequently have no idea what effect those changes make. So, I ask them to change only one variable at a time, and take a series of shots while changing that variable. For instance, put your camera on Program exposure and see what reading it gives you while shooting a scene. Say it’s 1/500 at f/8 at ISO 100. Now change your exposure control to manual and set the very same settings yourself. Take the shot. Compare with the previous shot done on Program. They should be the same. Now start changing the shutter speed by a full stop – say, 1/250. Now your picture will be overexposed. You get the correct exposure back by closing down the aperture by one stop (f/11). If you repeat this exercise, you will see that you have a set of correct exposures (1/60 at f/22, 1/125 at f/16, 1/250 at f/11, 1/500 at f/8, 1/1000 at f/5.6, 1/2000 at f/4).
Which of those is the “correct” exposure for your particular situation? That’s where the photographic intent comes in. Are you trying to show motion? Then a slower shutter speed (1/30 or less) would allow some motion blur. Are you trying to freeze action? Then a higher shutter speed (above 1/500) is more appropriate. Are you trying to isolate your subject from the background? Then using a wide-open aperture (f/4 or less) will give you a shallower depth of field and keep more of the foreground and background out of focus. If you want everything pin-sharp from front to back, then a small aperture (f./16 or f/22) is more appropriate.
Along this journey, you need to learn at what shutter speed you can hand-hold your camera without unacceptable blur due to hand-shake. That varies by focal length, but a common rule is that your shutter speed should not be less than the inverse of the focal length. On a full-frame camera body, with a 50mm lens, that would be about 1/50 sec (actually 1/60 sec is the closest to that). If you’re using a 200mm lens, that would be at 1/200 sec (or 1/250 which is the closest shutter speed to that). Any time your shutter speed falls below this value you risk getting blurred shots due to hand-shake. So, you can increase your ISO, or you can minimize hand-shake by using a tripod, or you can put a flash on and blast your subject with enough light to make hand-shake irrelevant. Again, your photographic intent will guide you as to which option is the most appropriate one.
Despite having over 40 years of experience in photography, I find that I am still actively learning every time I go out and take photographs. You’ve got to get the mechanics (exposure, focus-setting, focal length choice, external lighting) behind you to allow you to explore composition, texture, emotion, colour, and dramatic light. It’s like any motor skill, whether you are playing a sport or a musical instrument, or engaging in a skilled activity such as cooking, woodworking, driving, etc.
This forum, used in the right way, can help you tremendously in your learning process. For instance, if you identify what you’re trying to do in a photographic sequence, the other readers can give you feedback on whether you’re achieving it, and whether there is another way or ways to achieve your result. If you then incorporate this advice and re-post with your next series of shots, then you can see whether you’re “getting it” and give your audience a feeling of participation in your journey. On the other hand, random posting with no background information mean that the audience has no context within which to critique, and therefore you will not get much benefit from the reaction.
Sorry for the long post, but this topic comes up often, and the degree of frustration of both posters, and readers is obvious.