And quit buying domains. Just quit. Every noob goes through this and loses lots of money at first. Just quit buying and start reading, for a couple months. And then after that read for a few months more. Then maybe start buying
Now that you realize that these are "not so good" domains I would suggest you to learn about the domaining industry first.
Read this forum as it's a goldmine for newbies. Listen to the interviews of domain investors' on DomainSherpa, and once you are confident about what type of domains are good for investing/selling, then dive into domaining.