hi ... you are off to a great start ... a couple of things you may consider are:
1. centring your pages in the browser. right click on an empty part of the page, select page properties and check the centre in browser box and republish the page.
2. your index page is the only opportunity you get to grab your visitors so it would be great to read an introduction to what you and the website is about.
3. on your members page the photos are still quite large ... if you look at my websites you will see the photos are rarely larger that around 60 kb and most often more likely to be around 30 kb. there is a free pic resizer called pixresizer here that you can use to fix this.
4. maybe consider redesigning your links page it lets the rest of your website down. take a look at different websites and take it from there. text links are excellent for SEO.
5. i'll leave your key word question to someone fr more experienced than me but I suspect it could be that your key words may not be used enough on the pages.
keep up the good work