DP Blueberry- First Time Grower

I purchased 3 seeds and they got posted through the letterbox on the 28th March. I placed the 3 seeds onto wet paper towel on the 3rd April and the taproot showed itself by the 5th April, all 3 seeds cultivated. I then placed the seed using tweezers so that I don't damage the root into Plant Magic compost. I placed clingfilm over the pot to keep the moisture and humidity inside and placed them onto my windowsill, until the seedling showed. I am a first time grower, who fancies a challenge, I've got no fancy equipment and I am planning on growing eventually outdoors when the risk of frost has passed. I have used no nutrients so far in my grow.