Just understand if you want to get places in IT your going to have to climb the ladder, keep sharp on technologies, and make connections. It’s doable, but it takes effort. After a decade of cutting your teeth, your schooling should be largely irrelevant on your resume. This is my career path and I keep pace with my colleagues who all have degrees.
Counter point. Most computer power supplies have a curve to their charging efficiency (somewhere north of 50% load). If your PC is substantially below the peak of that curve, then adding load (the phone) could raise the PSU’s efficiency say from 80 to 85% (I’m making up numbers) which would affect the overall efficiency of the entire PC’s load.
I think your answer is still probably correct, but it’s an interesting nuance to think about.
Side notes: Some PSU’s use gallium, e.g., Corsair ax1600i, though by and large most do not. Also if your in the EU then your working with 220/240v PSU’s which adds more efficiency, but that would apply to the phone charger as well.