Hi,
I’d like to ask you all a very simple beginners question about 2D digital art 
Firstly: My aim is not to be pro. This is just a hobby for me. It also means I have limited time to practice so I want to do what gets the best results. Im a Design Engineer by trade so not completely new to drawing, and I know a lot of theory (how lighting and colors work on materials etc.). I dont draw art, but Id like to!
I have decided to practice a minimum of 1 hour pr. day initially. My question is what to spend the hour on? Just whatever pops into my mind? Should I decide on a certain art type? Practice line work first, or coloring, or compositions (I have been taking photos for many years, so I know a bit about comps), lighting etc.?
The artwork I usually spend the most time looking at is concept art of anything from fantasy to sci-fy. Big environments and small scenes where your imagination can fill in the blanks and create a story just by looking at the image (e.g. Philip Straubs work is amazing :bowdown: ).
I currently draw on my iPad (Procreate) and in a sketchbook if I start to see results Ill treat myself to a Cintiq 13HD 
Any comments you may have are greatly appreciated! Thanks!
PS. Ive been a member of this site since 2003, and have always loved the art and tolerance for all people shown on CGtalk, so thanks to all!