Congrats on the new camera. Now all you have to do is learn how to use it to the best of your ability. As others have suggested, learn to use your camera and all the functions and features that it has is a good place to start. This means go out and walk around and take images where you alter the aperture, speed, ISO, etc. As well, you need to learn about some of the basics of composition. If you Google "photography composition tips", or some variation, then you will find all sorts of references, but here is one to get you started -
Guidelines for Better Photographic Composition.. There are literally thousands of others out there. Check out web sites and postings by Ron Bigelow.
For the images you have posted: 1) the background is very cluttered and this detracts from your main subject which I am assuming are the leaves in the foreground. Parts of the leaves are blown out/overexposed and you will need to understand how to get this right in camera or how to deal with it in post-processing. 2) This is a silhouette of what appears to be a raptor, but it is unidentifiable from this picture. If you want to see how bird photography is done, I would suggest you look up folks like Art Morris and Alan Murphy. If you are interested in flowers then search for Harold Davis and Denise Ippolito, in fact, if you Google "flower photography" you will find all sorts of references.
One other suggestion, find a photographer, or photographers, whose images you really like and study them closely. Try and figure out what it is that you like about them and what it is that maybe you don't like about some of them. For example, if landscapes were of interest to you, then study the masters such as Ansel Adams and others. Anyway, I hope you get the idea. A lot of us out here are self taught and we learned from reading books by those who are at the top of their field and by reading postings on the web by today's masters. Hope this helps.
WesternGuy