I got a puppy at a similar time in my life two years ago. I agree with everyone-- the first six months to a year are brutal. My partner and I bought our dog together, but it seemed like I was the only one doing anything for him-- playing, training, feeding, etc. And that was bad because I was making my pup a priority over my work and over myself. I had already been depressed but the puppy responsibility and stress wore me down even further.
Similarly, my pup would not sleep or keep himself entertained with toys even after hours of interactive fetch and/or frisbee. We chose a high-energy herding dog, so he would go on walks but for him walking was the equivalent of having a nap. After about a year he became more affectionate, and now he even occasionally naps-- so there is hope!
I also am a proponent for crating when you're out of the house or at night. It gives your dog a safe place that she will associate with resting on a structured routine, with the added bonus that you won't have to worry about her getting into things around the house when you're not able to supervise.
On the other hand, when you are at the house I would suggest trying to keep your pup with you. Even if at first she is rambunctious and tries to get you to play while you are trying to nap, she will get the hang of napping with you. Even my little monster learned.

Just try to get some energy out of her before you lay down. Then not only will you feel less selfish for not crating her during your nap, but you'll also have a warm pup to sleep next to! Best of luck, Khione!