Back in the saddle?

Its been....four years since I've had this camera and I haven't done much. Im going to try this again. I have completely forgotten how to work with ISO, white balance, aperature, shutter speed, etc. I dont know anything about deciding what quality to set my canera to, what the values are on my lenses are, and sooooo much more. I need to do some more research. : D My three favorites from today and the ones with the best "quality". I need to get a lens that goes micro. I love the detail you can achieve and the mystery of not knowing what you are looking at.

Leah
Quality: Raw
Shot: 1/500 sec. f/3.5 50 mm
ISO: 800
Sunny day but in shade

Lawn
Quality: Raw
Shot: 1/1000 sec. f/3.5 50 mm
ISO: 100
Sunny day

Beeless Beehive
Quality: Raw
Shot: 1/500 sec. f/3.5 50 mm
ISO: 400
Sunny day. In partial shade