Commercial Fixed Wing
Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Training / Qualification
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Became Reoriented; Flight Crew FLC complied w / Automation / Advisory
Environment - Non Weather Related; Human Factors
On vectors to ZZZ ILS XXR we overshot our intercept to final; but made an immediate correction to track inbound on the localizer.  PF and PM were monitoring the multiple vectors; altitudes; speeds and configuration and when cleared for the approach PF did not push and confirm approach mode on Mode Control Panel. As we saw that we were not intercepting the localizer PF corrected the heading and used approach mode to capture the localizer.As we all work through COVID proficiency issues it's important to be vigilant at all phases of flight for errors and trap them as soon as possible.
On vectors to ILS XXR we overshot our intercept to final; but made an immediate correction to track inbound on localizer. FO was PF and Captain was PNF. Frankly; as PNF; I did a poor job monitoring. Contributing factors were a fixation on getting down as we were a bit high on the vertical profile (that part worked out fine); distraction of broken communication with Approach Control; fatigue due to short overnight; and also pilot proficiency/recency as both of us our new to our respective seats and have not flown much of the past several months.As PM; I should not have become so pre-occupied with the descent path as in reality we were still quite a ways out and correcting in a satisfactory manner. It would have been better to manage by big picture scan better. Had [I] been doing my job better as pilot monitor instead of micro-managing the descent path; I may have trapped this error.
Air carrier flight crew reported a track heading deviation and cited lack of flying as a contributing factor.