embraceofbeing on "please confirm guided transfer is the solution"

I have a free wordpress blog and want to install an AWeber web form to collect email addresses from my readers, but I can't do this because the free wordpress blog does not support plugins. I'm trying to find out the easiest way to do this. Is there a way to upgrade my blog from the free wordpress.org to a wordpress.com version so that I can have those options? I know this costs 129$ and I want to make sure that this is the best way for me to do this.
Another question: Does the transfer to wordpress.org allow me to embed you tube videos on my blog or is that an a la carte service? Thanks!