If you quit/resigned from your airline job then there is nothing for you to maintain. You will not have an income from your airline so no dues. If you want to stay "in the loop" with whats going on at your airline or all ALPA carriers as a whole then follow up with the news on the ALPA website and contact your rep (former rep) about any possible Associate mebership probgram you may be elidgible for. However, since you resigned I dont think there is all that much for you to do right now.

Good luck in your schooling and new career.