Any commercial course will involve some degree of hour building and as hours don't expire, doing a PPL now will still count later, even if the licence itself's lapsed by then.
You can see if flying's for you, and once the ab-initio sponsorships start again (which they will eventually), you'll look better in the interview than the guy with no more than a trial flight when you have to persuade the airline that this is the only life for you.
TMC