If flying for EK is your long term goal and you want to stay until retirement, it would make sense to get in and join the seniority list ASAP. However be aware it’s not all sunshine and roses. Fatigue is a major issue though not as bad as the B777. Pilots leave EK without a job to go to, or to join an LCC which really makes you wonder. The divorce rate in Emirates is sky high which would be a consideration as you’re recently married.
Sticking around for your upgrade will put you in a good position if you want to move to another A320 job as a Captain. It’s such a ubiquitous type they are everywhere and there are plenty of jobs going. You could also qualify for an accelerated command later on with one of the ME3 if you got sick of bus driving, joining as a DEC on the A320 with a promise of the A330 after a year or right seat A380/A350 for a couple of years and swap seats. DEC with an LCC in your home country is a possibility as well and you are still young enough to go back to the right seat if your national airline starts recruiting.