leaving the tube connected to the chest is fine, just move the one connected to the helmet to a more lower position so it can be believed by one that it does indeed make contact and connection to an un-observable oxygen supply on the back of the astronaut
drawings can be bad as long as you have a good character design, charlie brown may be low detailed when drawn, but he is still considered as a good drawing because of how good the design is
drawn in 2 hours 6 min
drawn in 1 hour 19 min
drawn in 3 hours 2 min
but uhhh idk how astronaut suits work that's just what I got from the reference \_(o_o)_/