First attempt

So, I dont know what Ive done wrong (probably a few things) but 2 didnt sprout and 2 others sprouted but shrivelled up and died in the first few days. I was going to start feeding them on day 7 but they were still so teeny I was scared of killing them all off. I got brave on day 8 and gave them a really small amount of food and crossed everything they'd still be alive in the morning lol...they survived, they are now 10 days old and I have given them a proper feed. So basically I now have 8, 2 of them are really small 1 of them doesnt seem to be growing at all but it doesnt seem to be dying either, not sure if the other 6 are looking as they should or not cause I am a complete amateur..