With Blogger, one doesn't need to become skilled with template development. You can find a great number of free template designs for your blog. You can check out these free Blogger templates from:
- Soratemplates - http://www.soratemplates.com/
- Templateism - http://www.templateism.com/
- BTemplates - http://www.btemplates.com/
- DeluxeTemplates - http://www.deluxetemplates.net/
Layout. In my opinion, you should choose a template depending on the layout and not the colors. Whether you want the sidebar to be on the left side or right or both; or you want the header to be wide or not. After all, you can edit the colors eventually.
Fonts. Your fonts should be simple and large enough to be readable. Simplicity is beauty as they say. Popular fonts are Georgia, Arial, Verdana and other web-friendly fonts.
Colors. Colors are very important for your blog to look great. The fewer the better. Creating a harmonious color combination will tie your website elements together and will make your web design well balanced.
You can visit https://kuler.adobe.com/create/color-wheel/ to choose your color theme according to your taste. Remember that the color of the text must be in contrast to the color of the background so it will be legible.
A clean cool web design makes your blog comfortable for your readers. Be sure to design your blog as cute as your personality. =)