Should I get a second kitten?

I rescued a little kitten and have absolutely fallen in love with him! I am not a cat person at all but now I definitely am. I've found that he's even way cheaper than my dog (Giant Schnauzer) on vet bills, food, etc. He is so full of energy like most kittens, I'm sure! He's only 5-6 weeks (he was abandoned) and is a crazy little guy. He's constantly playing and having a good time and has even warmed up to my dog. I am a student, however, and I will be gone in the fall for most of the day and unlike my dog, I can't send him to daycare during the day . Also, when I'm doing work he loves to climb all over me and walk all over my laptop and even sometimes accidentally turn it off. So I was wanting to know if it would be a good idea to adopt him a new playmate? Would they get along? Should I get a boy or a girl (I plan on getting them fixed)? Or do kittens prefer being the only cat? I have never owned a kitten before and I am much more experienced with dogs so any tips would be greatly appreciated.