Unless you have a previously existing and current qualification, hopefully with some relevant experience and up-to-date knowledge of the trade in concern, reinventing yourself as a reasonably-paid office worker will take about as long as the recovery of aviation, if not longer. Almost anything worthwhile in terms of income and prospects will require you to commit to it long-term rather than just use it to bridge a gap between two flying jobs. And the amount of new information you will likely have to take in will erase a good bit of your aviation knowledge unless you work hard to maintain it.
So, think twice. Do you want to abandon aviation completely and go for a clean start elsewhere or do you want just to survive financially until the market improves? If it's the latter, most jobs that will see you through might not be the nicest ones out there but they're about as much as one can achieve without switching careers once and forever. Think retail, delivery, customer support, remote recruitment etc. Those are all positions with a high turnover of personnel, so it's also unlikely that you will have to convince anyone that you will not bolt the very moment a flying job comes your way.