good luck here... my first batch ever was a Mr Beer kit with vague and ambiguous instructions. it said to boil 1 gallon of water/wort, then add 1 gallon of "cold" water to the fermenter to "avoid temperature shock" it made no mention of too much heat killing the yeast, or to wait until it was below a certain temp. simply said "mix with 1 gallon cold water, pitch yeast" so, in my thinking, "room temp"water WAS cold compared to 200 degree boiling water! I pitched my yeast with the water temp at around 130-140, and pretty sure it killed all the yeast.
no idea what fermentation looked like, I had no idea if it was working or not, but I let it sit the appropriate amount of time.
I saw no real signs of fermentation.
bottled it.
apparently SOMETHING got to it though. after it aged in the plastic fermenter for 4 weeks, and bottles for 3...it did carb, but it had a very strong, bitter cider taste. it was so bad I didn't finish the other 6 bottles, and I'm afraid to now. I'd rather NOT gag like I did before!
that was my only bad batch though. everything else since then has been great,(with the exception of one "bad" recipe) and I've done about 12 batches myself. the "bad" recipe was a batch of cider where I added a bunch of brown sugar and honey, used a champagne yeast, and it tasted very strong of "alcohol." it's still aging though, going on about 6 months now, I'll keep checking on it after every couple of months and see if it turns out better. it's drinkable, but not what I was expecting or hoping for yet.