Pretty much can't be done on a free to play account. Must have paid DLC.
If you follow these steps, you should get the Hawkmoon 2.0.
https://www.eurogamer.net/articles/destiny-2-hawkmoon-feather-locations-as-the-crow-flies-7004#section-1
The mission is S tier solo. Good Luck!
English
-
But they aren't free to play, they have BL and this Seasons pass.