If you have a bike, it is really worth actually visiting flying schools and airfields and asking in person. Go to the airfield, talk to everyone you meet, spend time sitting around, offer to help, get your self known. make appointments to see someone from the airfield management, the chief flying instructor of any flight schools etc.
If you can't visit in person, write letters.
Don't be put off if it takes a while, you will definitely find something if you are determined.
We regularly take on young people to clean aircraft, work on the ops desk, help with re-fuelling etc .... and they are usually rewarded with the occasional flying lesson and/or good reference when they apply for jobs or courses.
Good luck with your search !