White screen on admin.php file

I am new to Expression Engine and I am coming from a Wordpress background. I am little server management skill. Currently, I am EXTREMELY frustrated with how difficult this “simple installation” is being.

I have installed the Expression Engine Core files on my BlueHost server while following the proper instructions per this documentation:

https://ellislab.com/expressionengine/user-guide/installation/installation.html

At first I have attempted to install the files and got a 1611 error saying that something was wrong with the controller/wizard.php file. I changed the wizard.php file’s CHMOD to 644 (which worked last time) and now I get a white screen whenever I attempt to get to this url (http://www.mannachurch.org/ExpressionEngine/admin.php). I believe it’s a PHP error per reading other posts on this site, but I have NO idea on how to fix it. And here’s my first question,

why can’t the core files of Expression Engine already come marked with the appropriate CHMOD?

anyways, I have:

• reinstalled the system folder, CHMOD all files to appropriate rights
• verified that my PHP is 5.1 and above per my web host
• ensured my config.php file is writable (CHMOD being 666)
• changed “$debug” on the admin.php to “1” in hopes I would get more errors to investigate further, in which I did not (maybe I was looking in the wrong place)

I can’t even get off the ground here. I did install this sucessfully before, but I upgraded my web service to a “cloud” service and that’s when all this drama started to happen with the installation.

Can anybody please help?