Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 23; Flight Crew Total 2905; Flight Crew Type 2905
Communication Breakdown; Workload; Time Pressure; Situational Awareness; Confusion
Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Environment - Non Weather Related; Human Factors
Captain did not conduct pre-flight briefings per Standard Operating Procedures.  Even after advising of the threat that [are] due to COVID; I have not flown regularly at all; and may need a little bit more time or to be watched closely; Captain still skipped virtually all briefing elements. I missed that we did not login to CPDLC and get our departure clearance; which I absolutely would have caught with a proper briefing.  When contacting Ground Control; ATC stated it didn't look like we had our clearance.  I logged into CPDLC and received our clearance and verified all the elements before departure.
Air Carrier First Officer reported not obtaining an ATC departure clearance prior to pushback; and cited a nonstandard pre-flight briefing given by the Captain and lack of flying as contributing factors.