So, last November 2019 during my time getting back into drawing, I discovered an app on the app store called Shadow Draw (https://www.shadowdrawapp.com/)
The app helps take the user through drawing an image step by step and by drawing over the top of the lines created by the artist in the app itself. The app has a few free lessons, but you can subscribe for the more detailed lessons for £7.49 per month, i'd highly recommend it, it really has helped me draw more often.
If you'd like to check out Shadow Draw, you can down load it to try for free at: https://apps.apple.com/us/app/shadowdraw-learn-how-to-draw/id1223507083