Converting to Drupal

I am trying out the theme Box_Grey on Drupal 4.7. In the forum section I noticed when i click on "Active Discussions" it displays the information on a table with aa background that does not match my site (blask background).

Also noticed that on Win Internet Explorer 6.028 the right column is overlapping the area in the middle where the forum is.

http://caspervandien.com/?q=forum

I would like to transition an existing website into a Drupal site. I believe this will allow me to have more hands-on control and a sharper image. You can link to my site at www.CollegeRecruitE.com
How do I transition a website to a Drupal website. I had a company do my site. I spent over 10 dollars on a site that I have limited access too. Any/everytime I need something done to site, they charge me money. I'm tired of paying money for something I can learn myself. Please help me get started. Thank you,

Is there a way to convert from vbulletin to Drupal?

Is there a way to convert from ikonboard to Drupal - users and posts?

How can I Efficiently help High School athletes find and hopefully secure College Scholarships. I intend to offer a free networking solution that allows people to help themselves in an efficient manor. Any suggestions as to how 'best' to start with Drupal web design. Point me towards a direction and I will explore. Thank you,
CollegeRecruitE.TV

ive installed it and im getting this error Could not open phpBB2/config.php for inclusion