Alcohol content can be estimated by using the starting and finishing gravity/Brix readings. 12 lbs of honey in a 5 gallon batch gives about 12% abv if fully fermented. The pound of berries adds only a small amount of sugar in 5 gallons.
A single pack of dry yeast is usually enough to ferment 5 gallons; several hours of lag time is not uncommon.
Check out the NewBee guide (link at left) for more info including using a hydrometer to estimate alcohol content and yeast selection/management. Welcome to GotMead?