Looking for MNS Advice

I'm working on my first project (MNS) and I'm concerned I'm not going about it in the right way; I could really use some advice from experienced members.

For starters, the domain I'm using doesn't have any of my keywords in it. It's a branded domain name that I bought before I ever considered applying SEO and using the site for marketing, but the name is pretty general and I figured I could just slap any kind of content on it without people questioning the relation of the name. Now I'm worried that having a domain name that hasn't been marked with a keyword is going to affect how I rank in the SERP.

I'm also concerned about my keywords, and the way I'm putting them into use. I'm building my site in a format like "domain/keyword-1-here," "domain/keyword-2-here," and I intend to try and rank those pages exclusively while filling the rest of the site with quality original content (downloads, resources, etc.).

Keyword 1:
- CPC: $7+
- Competition: Low
- Difficulty: Easy
- Global: 2,000
- Local: 1,000

Keyword 2:
- CPC: $1+
- Competition: High
- Difficulty: Relatively Easy
- Global: 3,000
- Local: 2,000

I've written a solid article for each of my pages littered with the keyword, variations of the keyword, and related niche keywords I thought might be used in relation to those keywords (but I wasn't focusing on those, just adding them in for SEO). I intend to select a new keyword every now and then and build several very strong, high-ranking niche articles.

The problem is that my "bonus" content (like the downloads) isn't very SEO compatible; the terms are too broad and not many people are searching for it specifically. I suppose I could find a keyword to work into the content, but I'm wondering if it's a waste of time to focus on ranking with these pages.

1. Am I going to have a harder time ranking without a keyword in my domain?
2. This was my first time researching keywords; do they seem okay?
3. Should I focus only on ranking my keyword-specific pages, or should I attempt to rank all of my pages.

Thanks for your help, I can really use every bit of it I can get.

You're approch of having different pages for each keyword is good.
You will rank much easyer if you do SEO for each page,but you'll have a hard time managing the backlinks.
Your keywords seems like winners for a micro-niche.
Use this linking structure www.Domain.com/Exact-Keyword-here.php