Templates are just basic HTML & Variables that call data from a database, nothing more, nothing less. If you do not know HTML well, then it probably will be hard for you to edit them, if that is the case, I would suggest searching on
Google for some HTML tutorials to help you learn. Once you learn HTML, you will see how easy it is to modify things (note: HTML and PHP are 2 totally seperate thigns).
Regards
- SaintDog