CAN SOME1 PLZ GIVE ME SOME INFO ON HAIR EXTENSIONS!?!?!?

ok, i have short hair thats about 4 inches in the back and like5 or six on top... i NEED extensions. i'm 13 and ppl keep asking me if i graduated from college with them!!!!!!!!!! i look WAYYYYYY too business like, and i just can't take it short anymore. it takes about 1hour to style it every morning, and iis annoying the crap out of me. the extensions are going to be used daily, and i don't want to clip them in because that takes FOREVER. i want the 18 inch extensions. do you kno if these are okay?: a href="http://www.sallybeauty.com/Human-Hair-extensions/SY5,default,pd.html?cgid=Hair16-03" rel="nofollow"http://www.sallybeauty.com/Human-Hair-ex…/a and is this a good glue?: a href="http://www.sallybeauty.com/hair-extension-Glue/PROCLM10,default,pd.html?cm_vc=SEARCH" rel="nofollow"http://www.sallybeauty.com/hair-extensio…/a also, i need a glue that is latex free. can you tell me a really good brand, a good glue brand, and if i can get it at sally's beauty supply for $50 and under AWESOME! lol