Modify a template hosted in Bluehost

We have recently installed a template in Bluehost. This is for a nonprofit site. We want some modifications to the template. This is not a complicated job as those modifications are simply to update 5-6 pages. No backend programming is necessary. Bluehost provides WP within their system. If you have worked on Bluehost (or in any such hosting company) template, you would know what I am talking about.