Hi Ola 
Facing your fears is good! i used to hate drawing backgrounds but knew i needed to learn since making comics = need backgrounds. but now they aren't that bad anymore!
In fact a few yrs ago, when i was writing one of my trailer outlines, i wrote "pan over the beautiful scifi cities" and in my mind that looked great but when it came to thumbnailing it i was like uhhhhh nvm lol why did i write that i can't even draw buildings XD
Also in case ur wondering said trailer is not done. i still have lots of plotbuilding/worldbuilding/characterbuilding to do for my story before it can be turned into a comic and i might add more stuff to the trailer as i plotbuild as well.
and now while i still can't draw the kind of background i wanna its still much better compared to before so you will get there too with time and practice 
as for gesture drawing, i would recommend picking a place to start when the timer starts and start with that spot every time and not spend precious seconds figuring out where to start.
for me i always like starting with the head, then the curve of the spine, then the curve of the hands, then the feet and then add deets/meat on top of that skeleton