Trying to get 2.3.0 working now...
I got a little further by doing as instructed per Sam. However, I am getting the the error below.
I have submitted a ticket for this to my host (reseller account). However, is there anything I can do to get past this?
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Installing SilverStripe...
I am now running through the installation steps (this should take about 30 seconds)

If you receive a fatal error, refresh this page to continue the installation

Creating 'mysite/_config.php' for use with _ss_environment.php...
Creating /home/aliyswor/public_html/mysite/_config.php
Creating '.htaccess' file...
Creating /home/aliyswor/public_html/.htaccess
Building database schema...
Checking that friendly URLs work...
Friendly URLs are not working. This is most likely because mod_rewrite isn't configuredcorrectly on your site. Please check the following things in your Apache configuration; you may need to get your web host or server administrator to do this for you:
mod_rewrite is enabled
AllowOverride All is set for your directory