I learned a lot about operating cameras on digital-photography-school.com. They're a good resource, and they have articles on stuff ranging from theory, gear usage, and post-processing.
In general, make sure that you're exposing properly. I'm a Nikon user, but I'm pretty sure your camera has something the equivalent of an exposure meter inside it's viewfinder. It usually looks like this: <------O------> And has bars around it to show where you're exposed. You'll want to ensure that those bars are lining up to the O in the middle. That's a good start.
One way I've seen people learn is to wade into M mode by jumping into P and A mode. I liked to use A mode when I Started out. this would let me adjust the ISO and the Aperture, but did the shutter for me, so it was one less thing to worry about as I got the hang of changing the different settings. Usually try to keep your ISO between 100 to 400 for most shoots, as this will help reduce noise. I shoot up into the 3200 rarely, but I think I've shot that high only 3 times for a purposed shoot (IE something I was making money off of or intended to show here on dA.)
As for focus, I continue to this day to use autofocus except in rare instances when manual serves better (ie, on my most recent shoot I experimented shooting into the sun for flares, and autofocus would often focus on the flares over my subject.) I think the best way is to build into it slowly, like with any art form.
I hope that's of some help. If you've got any other questions let me know. Always happy to answer. And happy shooting!
semakin besar asa/iso, semakin besar cahaya yg diterima semakin kecil f, semakin sempit depth of field, semakin banyak cahaya yg bisa masuk semakin cepat shutter speed, semakin sedikit cahaya yang bisa masuk. tinggal atur2 ketiga itu aja sih. semoga membantu kk
I remember I was so confused about this too when I first got my DSLR. Try turning your shutter speed down as well as your aperture. Turning up your ISO helps too, but this can sometimes make the picture look more grainy. Balancing these three settings together makes for a good photo.