Thanks for your awesome post. ROS is beautiful system. For ROS and robotics enthusiast I really recommend — in order to learn, train, solve the problems, meet friends, be inspired and more (to check The Construct team website: https://www.theconstructsim.com/
and youtube channel:
https://www.youtube.com/channel/UCt6Lag-vv25fTX3e11mVY1Q

They are state-of-the-art!!!