All but #2 are out of focus.
#3 is under exposed...and I have no idea what I am looking at there...
#4 could use a little more focus as well- adjust your aperture to get more of the plant, or at least the entire front leaf, in focus.
Also, not much going on here, keep your eyes open for more visually appealing or stimulating subjects.
Keep shooting, you are doing well!
The more your practice and experiment the more you will learn.
Try setting your camera on a tripod and taking several...5,6,7 shots of the same thing and change a single setting each time. keep track of which witch is which and compare the variations- you will learn a ton and how to best hone your craft.