Time on my hands

Well I had sometime on my hands today so I decided to search for a new blog template and well let me tell you is was no easy task. I found some that I really liked and then I couldn't get them to work. I tried forever to get one of them work. Well then I discovered that you have to revert to classic to get most of them to work. Ok that was easy enough....well at this same time my sister is asking me how to change her new blog template so I am trying to tell her what I know while in the meantime confusing myself. To make a long story short and it is long I came to the conclusion that some templates out there are super easy to use and some are not so easy. So if you decide to change I hope you have more computer knowledge than me or that you find one of those easy sites that are out there. Cuz if you dont you could end up wasting numerous hours of your time just like me.