Please join the forum if you already haven’t. There are many staff and members here who will go out of their way to help you suceed. Post some pictures and supply more info so we can see what you may be doing wrong. I’ve had suceess with rockwool blocks and a few failures. My last grow I tried using a different seed starting system and had great sucess with it. You really need to wait for roots to come out of the bottom of the block before planting into something. I germinate using damp paper towels wrapping seeds and sealing inside a ziplock baggie. Put into a dark place like over the fridge in a cabinet for 2-3 days and this is what I had for results.
Seeds after 72 hrs in germination.
Then put into the seed starting system whcih you can find almost anywhere. This one expands into a bag and just wait for the root to show out the bottom which was a couple days. Put into they bag or block with the tap root facing down once the bag expands.
The next day they all were showing.
12 days after putting into my hydro system.