One step for the Semi-Charged Awoken Talisman is to complete Ether Harvest. This Destiny 2: Forsaken Ether Harvest Event Location guide will tell you exactly where to find the Ether Harvest Public Event so you can defeat the Three Chieftains and progress with the mission.
The Public Event is not exclusive to the Talisman objective, so it happens naturally whether you have the Semi-Charged Awoken Talisman or not. As with other Public Events, the Ether Harvest Public Event is shown in-game as a bright banner. In order to start the Public Event, you need to interact with the banner until the bar is filled.
Destiny 2: Forsaken Ether Harvest Event Location
You can find the banner exactly here on the map. Public Events are timed based so if you don’t see one straight away, you can either wait in the area or return to orbit and hope to get a different version of the planet.
Once the Public Event begins simply take down Three Chieftains and then the final Abomination. This will complete the final step of constructing the Talisman.