You can do both at anytime, yes. If you are adding oak you have different varieties and forms. If you can, get cubes/staves instead of chips. Squatchy wrote a post called wood management thread about oaking. Is heavy reading but good info anout the different types and what they do. You dont need to get to it right away. But oaking with cubes is usually done for 1+ months so some planning is adviced.
Backsweetening is done after stabilizing. Ideally stabilize then wait a day or two before adding more honey. Dont add too much. You can do small additions and tasting to see if the sweetness level is at the desired point. You cant take the honey out. So as you dont know what sg you are gonna want take a careful approach. That way you'll learn more. Honey added this way takes a couple months to integrate fully and i recommend you wait some after adding and consuming. Also as your first time stabilizing dont bottle too soon after backsweetening, to make sure fermentation does not restart.
Backsweetening is done after stabilizing. Ideally stabilize then wait a day or two before adding more honey. Dont add too much. You can do small additions and tasting to see if the sweetness level is at the desired point. You cant take the honey out. So as you dont know what sg you are gonna want take a careful approach. That way you'll learn more. Honey added this way takes a couple months to integrate fully and i recommend you wait some after adding and consuming. Also as your first time stabilizing dont bottle too soon after backsweetening, to make sure fermentation does not restart.