Small Aircraft
Flight Crew Private
Flight Crew Last 90 Days 1.1; Flight Crew Total 657.3; Flight Crew Type 457
Situational Awareness; Training / Qualification
Deviation / Discrepancy - Procedural Clearance; Ground Incursion Runway
Flight Crew Took Evasive Action; Flight Crew Became Reoriented
Human Factors
I taxied just past the runway hold at C3 from D3 in an effort to perform run up clear of the main taxiway. The hold lines had been moved back and I was now over the hold line.  I realized I was over and did a 180 back to taxiway C and called ground for instructions to taxi back to the hangar.  I just completed the Runway safety course yesterday and am beginning recurrent training this afternoon.  My plane was just out of annual and after an extensive preflight I wanted to do a few trips around the pattern to help verify the soundness of the aircraft before I took my flight instructor up with me.  I am fairly new to DVT.  It is way more complicated on the ground and in the air here than I was accustomed to so I wanted to get with an instructor before I flew around the area too much.  Then Covid hit and I couldn't go up. None of this is an excuse.  It is just background that I hope will be helpful.
Private Pilot reported runway incursion occurred during taxi and cited being new to the airport as a contributing factor.