Custom fundraiser template help

I would like to create a custom single fundraiser template, and more than likely also a checkout and confirmation template as well. I have read the fundrasing-templates.txt file and understand how to link the template(s), as well as the naming convention. What I haven’t been able to find are any instructions or examples related to creating the actual template(s) itself/themselves. Ideally, I’m only wanting to make minor html changes to the template, and still be able to fully edit everything in the admin/fundraiser area, including style and panel position. Where do I find the information I’m looking for? Or, do I have to “merge” aspects of the template-functions.php file with my themes’ single.php file? The answer will help me determine the direction I take, since I can always us a less desirable option of designing with shortcodes. Thank you for your help.