Literary Agents

Ok. I might have mentioned it before, I'm not sure. However, this entry is about literary agent or no literary agent.

As I research publishers and such, I see that many only take queries from agents, and the big houses only take them from agents, no exceptions. So, I don't know if I should be seeking a literary agent or just focus on publishers that accept queries from new authors without agents. Also, if I do go with one, should I go with an established agent? There's no degree for one, so can I just ask a friend that I trust that has some sort of intelligence to be my agent and team up from there?

I am really confused about this whole process. I just really want whats best for my book and will get it out there. Also, get me paid enough so I can devote my career time to writing more and allow me to be home with my kids.

What path do I go down? Anyone have any suggestions?