open the ✎ activities panel on the right, then drag things onto a day.
blocks have a duration but no fixed time — the order is just the order you'd like to do them in.
the goal is to see if your week adds up the way you want it to.
↖ 24h minus the daily fixed stuff
every day ~
drop things you do daily (sleep, meals, shower...). they subtract from each day's budget.