If you read the MySQL manual on Activestate Perl, you see that to install the MySQL DBD, you'll need the following commands:

ppm
install DBI
install ftp://ftp.de.uu.net/pub/CPAN/authors/id/JWIED/DBD-mysql-1.2212
+.x86.ppd
[download]

A handy program that I know, is PHPTriad from PHPGeek.com which installs PHP, Apache, MySQL, Perl and PHPMyAdmin for you on a Windows box. No need to bother with PPM or CPAN to install the modules you need to get Perl and MySQL and Apache working nicely together.

Finally, I would re-run the Activestate Perl installer and remove PPM3 which you seem to be running. It is still in beta and, therefore, shouldn't be used by 'novices'. Standard 'PPM' (aka 'PPM2') works nicely and I've had no problems with it (although I've only tried PPM3 around 4 times myself).