first time build

I know that the title sounds a little absurd but here's the backstory! During the pandemic I found myself cooped up inside, (as I'm a type 1 diabetic and therefore high risk) and saw this channel JohnnyQ90, and spun down the rabbit hole that is model engines! the first engine I got my hands on...

So for someone who did machining in the 80's as part of an apprenticeship, built one steam engine in 2019, take on a Jerry Howell V4 ? Better not answer that as it is very optimistic / naive I will admit , especially when it seems every single tolerance is soo critical. I must be 150...