All the wine I make is country wine so here are few things particularly about blueberry wine. (Don't take this as just being negative but more to help you save time, effort and perhaps a little frustration.
1) Blueberries
* don't need to be cooked, heated or really processed much at all. A good solid mashing or crushing is all you need. You could freeze them for a few days then thaw and that will make the mashing easier.
2) Your current wine could be fermented more if you wanted to get the sweetness reduced a bit.
3) Clearing, as others have said should occur naturally with blueberry wine.
Normally 3-6 months and it should be close to sparkling clear - however, having set the pectin by cooking the berries it may take longer and more pectic enzyme than normal (as much as 3 times the normal amount) But it should clear with little to no intervention (No Fining agents or Bentonite needed)
4) The longer you can let it age, the happier you will be with the results. I opened my first wine at 4 1/2 months with friends. They were kind and we were all excited - the first homemade wine they had and my first as well. BUT - 5 months later I opened another bottle and the wine was totally different - Impressively different. Time makes a HUGE difference in blueberry wine and many others as well.
I know, this is the hardest part of wine making.
5) The quantity of fruit needed for a good wine is very dependent on your tastes. Some folks prefer a wine made with no added water - 100% fruit juice, some go very light on pounds of fruit per gallon. I ten to go toward the upper middle with blueberry wine - About 6 lbs per gallon of wine. You can get a decent wine with 4 lbs./ gallon but the flavor falls off a bit if you go lower. (This is just my personal preference)
6) To add sugar and get quicker more reliable SG readings, make a 2-1 Simple Syrup with 1 Cup Water & 2 Cups Sugar. Heat the water almost to boiling and then add the sugar. That way when you stir it in the SG reading will be very close to accurate right away. (See this post on the beginners forum to learn from someone else's mistake - better than the school of hard- knocks
Hydrometer reading has increased after fermentation... )
7) Once you have your wine must prepared - give it overnight to settle - for the ingredients to fully blend, before you pitch your yeast. Typically I prepare the must on one day, using K-Meta to kill off any bad yeasties or bacteria, then the next day (18-24 hrs later) , recheck your SG and pH and see if you need any further adjustments. If they are just small changes, do those and then pitch the yeast. Try to avoid going beyond 23-48hrs after the initial prep before pitching the yeast.
By the way, you need to start another batch of wine ASAP, That's the best way to make waiting easier. The more you have "in process" the easier is it is to wait. Also keep a notebook of each batch to include all your steps dates times measurements. It helps later. I also tag each container so I know what I did when.
* Very few fruits, if any, need to be cooked before making wine. Steaming to extract the juice helps with some fruits but, most don't need any heat to prepare.