Hi Caitlyn and welcome!
When you want C&C (comments and critiques) on your photos please do not post more than 3 pictures. It is more helpful for you since you will get better feedback on a smaller amount of pictures. It takes a lot of time to C&C a large amount of pictures and most people won't take the time to do so. Also, please let everyone know what you like about the image, what you don't like, what you were going for, etc. Oh - and number your pictures! You cannot actually upload pictures to this site. There is a sticky in the beginners forum that explains how to post pictures if you want more information.
1 You cut off the top of his head, his arms/hands, and a piece of his ear!!!!! The WB looks off to me. It looks a little yellow but that could just be my screen. Adorable kid!
2 Looks a little soft to me. I don't like the way the light is falling on the subject - the side of his face is blown out (bright) as well as parts of the bed. The baby is also right in the center of the frame (look up the rule of thirds). The B&W conversion isn't very good either. Did you edit these? What software are you using
3 This one is kind of boring IMO. Too much empty space above his head, looks a little soft,
4 This one would've been better if you were in front of him taking the shot. As is, its not very interesting. (IMO = in my opinion)
5 I like this - he is so freaking cute! He's darker than the background and it should be vice versa. The blown out sky attracts the eye. Maybe cropping it would help but you will lose even more of the hat.
Good job so far! Are you shooting in automatic settings or manual? I'm a beginner as well and I found that the book Understanding Exposure by Bryan Peterson is really helpful! It took me from using automatic settings to using manual within a couple days. With manual settings you have more control over how the picture will come out. I also recommend reading your camera manual a couple times.
Are you editing these pictures and if so with what program? For black and white pictures do not use the camera settings to take a black and white picture. Take the picture in color then convert it to black and white with editing software.
Cambridge in Colour - Photography Tutorials & Learning Community
^^ excellent site - digital photography tutorials