well the first one is quite not-so-good. first of all it lacks clarity, probably from miss-focusing with a small dof(or smth else that i can't put my finger on right now,probably compression); second of all, the reflection says quite nothing and should (at least mostly) be cropped away; third, you're in too close, try macroing out a bit so as to give the viewer a chance of actually understanding what you wanted to photograph. and also i dont think it's that big a subject anyhow. try something more nicely done to macro it.
the second however is high-standard i would say. nice subject, nice pov, all is fine but the all-important details which show you're a beginner. but it'll pass. firstly, the image is crooked, so you'll have to straighten it, if you don't know how tell me your image editing program and i'll guide you through. and secondly there is an uneven crop so to say, there is more space on the top than on the bottom in what is a symmetrical shape. so make them even.
along the lines of your short experience with a camera, i suggest books, just borrow one or two from the local bookshop, you''ll never read them again anyway, but they are very useful. they teach you guidelines and all the small things that you never would think mattered.
the resizing is done by entering in (say photoshop) to image size and setting the dimensions to something like 640*480 or less. if you have questions don't hesitate to ask and, last but not least, welcome to the community!