Can I modify my blog's appearance?

Of course you can. There are many websites out there that allows you to change your template.

A popular website is: http://www.blogskins.com/

BUT, pls remember to Backup your existing template first! This is to prevent you from losing your data (i.e. posts) & template.

<If you are using www.blogger.com>

1. To backup your template, login to your account.
2. Click on "Template"
3. Right click on those bunch of source codes.
4. Choose "Select All", then press "CTRL+C" to copy all.
5. Open up Notepad & press "CTRL+V" to paste it.
6. Save and name the file as you like
7. Now you can proceed to testing the new template.

* Remember to make a copy of your posts too~ Feel free to leave a msg if u need more info