Of E & B, First, welcome to the forum. Glad to have you aboard.
As far as your questions are concerned, I suggest that you spend some time perusing the "Country Fruit" section on the main page. Basically, you can make a wine out of any fruit that has sugar (which converts to alcohol during the fermentation process). The more sugar, the better, but you can also enhance the sugar level of the fruit through a process termed chaptalization, which involves adding sugar to the juice either pre or during fermentation. As far as residual sweetness, you can control that by fermenting whatever fruit you are using to dry (i.e. essentially all sugar has been converted to alcohol), stabilize the wine with Potassium Sorbate and then back sweeten to your desired taste, if any.
As far as blueberries are concerned, many on the forum make blueberry wine. Again, you can ferment it to dry and sweeten it to your taste, as described above. If you like the lemon flavor in the background, try adding the zest of several lemons to the wine during the secondary stage of fermentation, i.e. when the Specific Gravity is at or below about 1.020. You will need an hydrometer for this which can be purchased on line or at a local brew shop.