raise action by yourself : better not as it would be a trouble if you were to mess up the guitar.its best to get someone experienced in it to do the stuff for you.hopefully u can steal some knowledge by watching the ppl set up your guitar.that is,if they let u see what they're doing.u can also get someone experienced in guitar repair to teach you,not the ones in the shops.maybe a friend that knows guitar repair to teach you.
hahas so lesson learnt,check properly when you are buying a guitar and make sure u try it out on the spot and see if theres anything wrong with it.
maybe you could actually go back to the shop that you brought the guitar and ask to see if they could set it up for you since that u brought the guitar from there not long ago.
good luck for finding reasonable prices for your setting up!