Hi Myrrh,
Congrats!!
Did you make a full backup of your new installation?
You could actually do a clean 2.5.1 install, however, there are still two problems with this:
- You cannot avoid dealing with the minimum environment requirements for Moodle, that is, having a new PHP and a new mySQL version installed.
- Backup user data from version 1.9 cannot still be restored into 2.5. Only course contents are restored.
I imagine that "the things I named" that worry you are those I listed after the three dashes? Well, we can work with each one a step at a time.
Can you find out what PHP and MySQL version do you have installed? It would be also good to know what web server (Apache, IIS) and what operating system (Windows, Linux, Mac?) do you have, and their version numbers, too.
One last question (for the time being ), do you have phpMyAdmin installed?
--- edit
Sorry, I had forgotten about checking your profile to see about the environment you have installed...
Windows 7
Webhost server... ¿which one?
Php 5.3.14
MySQL 5.5.29
Well, good news (very good news, actually), you don't need to change/upgrade anything in your setup!