From there 1.000 thru 1.08 is a medium dry But it's not so much where you sweeten it to it's where you like it.
Take a small amount, maybe a cup and add 4 ounces of sugar or less it it. Invert it. Then siphon some dry wine into your testing jar but let it fall about 2 inches short from where a hydrometer would float. Spoon in some of your sugar wine you just inverted. See on your hydrometer where it is. .998, 1.003 etc. Take a small taste and see if you like it, too sweet or still too dry. Repeat adding more or less of each wine to your test tube until you discover what you enjoy.
From there blend the two wines back together. Take a new reading. Calculate how much sugar is needed to hit the mark you like. Invert and blend.
It sounds like a lot but can be done farely quick. Let it rest a few weeks then bottle. Remember the sorbate.
In the future you will learn approx. where you enjoy what wines giving you a better area to start out at.