Strawberry is a problematic fruit to make wine from. Citric acid dominates, colour retention is dreadful and you have to make a sweeter style to make the wine approachable. It eats free sulphur dioxide. Having said that, it does make a good blending fruit wine. Briefly, here is how I do it. Buy strawberries that are more than 10 brix. I make sure that the pH is around 3.55. I crush the strawberries, add mashing/pectolytic enzymes and enough meta to just make the must go pinky cream ( sorry, about 70ppm). I then wait 24 hrs. Then I get a neutral yeast and get it fermenting,and add it to the must. Once the cap comes up, I put the fermenting juice into secondary and adjust the sugar to your requirements. Ferment dry ( with some nutrient ). Immediately the ferment has finished, rack it with another 70ppm free S02. Over the next week, the free S02 level will drop significantly, so add another 30ppm S02. Finish as required with sorbate etc. If you want to be brave, skip the commercial yeast and try wild yeasts. It will take 5 days, but it will begin to ferment. This method does not need to take the green calyxes off.