I spent half of my first 6 months working as a full time dev fretting that someone would find me out - as I couldn't do more than an hour or two of proper dev i

I spent half of my first 6 months working as a full time dev fretting that someone would find me out - as I couldn't do more than an hour or two of proper dev in one day, I couldn't make my brain do more and a lot of time was wasted. But over time I spoke to my colleagues and _nobody_ does more than that really. We end up spending the other time doing less intensive, administrational stuff where possible, or just slacking off. It's fine, if the work output we were doing wasn't enough they would have fired us forever ago.