Hi and welcome!
is a very nice holiday destination, you will enjoy it!
About getting to Nerja from Malaga airport, there are two other options:
Car hire at Malaga airport
with a similar price for 1 week
Taking the train or bus to Malaga, and then taking the public bus to Nerja from the Malaga bus station
. Cost will be much cheaper and affordable for a student
Let me know if need more help.