just use this theme and move on, no reason to worry about your theme this early in the game:
WordPress › LightWord « Free WordPress Themes
Focus on adding content with semantically related keywords to your site and do link building every single day. I would assume you have a lot of time on your hands, so there's no reason you shouldn't be spending at least 5+ hours on your site per day.
Build 2-3 sites at once so you can stay fresh and be more robust.
DONT CHECK YOUR RANKINGS DAILY. Just build links. Write content. Build links. DONT CHECK YOUR RANKINGS DAILY.
Memorize the top 20 results in Google. Seriously. You should be able to recite your top 20 competitors from memory for your main keyword. Dig deeply into their backlink profile (don't buy tools, use site explorer and just look at where there links are coming from). analyze their keyword density, site structure, image usage, etc.
Don't buy services in the BST if your budget is $500. spend that money on buying High PR commenting lists and thats it. Add 2-3 articles to your sites per day, build links for 4 or 5 hours a day, and in a month, reevaluate. Do you have money to reinvest now? ok, spend that on more content and good links. Maybe buy some Amit's bookmarks. Maybe a small mini-net.
Pick up a copy of scrapebox and use it to scrape for High PR targets. Don't spam with it if you haven't done it before, you'll just end up with low success rates and be frustrated. Use it to create small lists of PR 4+ targets.
Don't get hung up on analytics, just keep building.