Modifying blog template is different with HTML template. When modifying template you need to know some knowledge about CSS style. But not for today, no CSS skilled needed.
How to modifying HTML template for blogspot?
Tips number one:
Download template for blogger then insert any script you want. If you have some problem when inserting scripts all you have to do is replacing code below:
replace < with & lt ;
replace > with & gt ;
replace " with & quot ;
(All the green scripts type without space)
Tips number two:
Don't make your own template. But if you still want to make your own design, it's better to re modified template from template that work good.
Tips number three:
Keep practice, and practice until perfect :)
hahaha... that's my newbie tutorial ;p