Small Aircraft
Flight Crew Instrument
Flight Crew Last 90 Days 13; Flight Crew Total 6000; Flight Crew Type 5500
Training / Qualification; Situational Awareness
Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Became Reoriented
Human Factors
Flying IFR at 2;000 feet I incorrectly entered the approach information for the RNAV GPS Runway X approach to ZZZ and consequently the aircraft deviated from that depicted on the approach plate for the GPS approach.   My flying time has been greatly reduced since the COVID-19 pandemic and I entered incorrect information in the GPS by mistake.  I have since taken a course for 'Rusty Pilots' on the internet in an attempt to stay adequate and I have also scheduled my 'Flight Review' with an instructor.  I think the reason for the mistake in entering the GPS information was due to greatly reduced flying time experience since COVID-19.
GA pilot reported a track heading deviation after entering incorrect information in the GPS and cited lack of flying as a contributing factor.