WotLK Newbie question about boosting skills

[AngelEyes80]

Im sorry to even have to ask but im at a loss here. I just started playing wotlk and i have no clue how to boost my fireball damage. Im a lvl 10 mage (blood elf) and im not sure what im doong wrong but the damage is still super low which means i die pretty fast if more than 1 monster attacks at once. Ive tried looking it up and apparently im missing something. Thanks in advance for any help.

[angrylol]

You go to trainer to learn higher ranks for spells. Also you should use all kinds of spells to freeze enemies in place/slow them to kite. Mage is very squishy and dies fast if you let enemies attack you.