@nordlund, welcome to WMT!
Do you have a hydrometer? If not, it's the one essential piece of hardware that is universally recommended. This thread explains how to use one:
How To Read A Hydrometer. By taking a specific gravity reading before the introduction of your yeast to the must, then again when fermentation is complete can you determine the alcohol percentage by volume. Subtract the final reading from the beginning to get your answer. When your hydrometer...
www.winemakingtalk.com
Fruit / Country / non-grape wines almost universally benefit from backsweetening, which brings out fruit flavors and aroma. How much? That depends on you and your tastes. My version of sweet is (at most) off-dry by most standards, while other folks like their wines much sweeter. Do what
@ChuckD recommended and do some bench trials to see what works for
you.
BTW, how old is the wine? Bulk aging is recommended to give the wine to undergo natural chemical changes, for the flavors to meld, and for sediment to drop (better in carboy than the bottle!).