Hi, by “following” people usually mean starting navigation on an imported GPX route. That’s not possible yet. You can work around it by converting the GPX track into a plan - see here
But you wrote “start Rastreator (rec),” which probably means “start tracker (record).” That’s the recording function, you can start it from the “Start tracker” menu, but note that this menu is not available once you’ve opened a track. So first start the tracker, and then open the route from My Maps. You can then follow the imported GPX track by checking your blue position dot against the red imported track, and at the same time a new recording will be saved of your actual movement. At the end of the trip you need to stop the recording, and it will automatically be saved to your account under Activities.
