Unfortunately, I have been a Design Draugthsman for many more years than I care to remember, and my sketching and drawing is now very structured, even when sketching freehand details.
Once I have retired, I will have the time to put in the practice, and yes my retirement will be more of a change in vocation, rather than a stop everything and stay at home.
So, we shall see in another year or two, to see how we go with watercolour and pen & ink sketching.
So yes your right re hard work, been doing it all my life, just mostly for others, nearly time for myself
cheers
vnkiwi