From the experiences that a lot of pilots have had through the last 18 months, the best non-aviation qualification is either security guard or warehouse and logistics. There seems to be a number who are getting some sort of cyber security qualification which I am told is a growth industry. If you really want to be a pilot just go and get your flying qualifications and worry about the uni bit later. By the time you are 30 you will be in an airline and can study part time to get the Uni qualification that might future proof your earning capacity.