Help help newbie. My plants growing right and falling

Hello ok well im new to this my seed is 5 days old, i have no pics so il describe it as well as possible. On monday it germinated, i put the wee white tail into the soil and made sure the seed was out of the soil, it began to grow upwards(woooo) i then transplanted it into a bigger pot which would be its final, it began growing tothe right and it looks like the stem cant hold the weight of the shell its been in total darkness as it is right now i dont know whats wrong somebody help. Thanks

u need to get that under some light as soon as it breaks the soil
an depending on wat soil u got u should only feed it water
4 the first couple of weeks

Kl well ive put it at the window right now il take pics of it with my phone later on, my camera has broke can you recommend lighting ? Right now its getting sunshine but at night should i stick it under a 400w ? And when itC
comes to light cycle should i stick it at 24/0 or should i do 12/12 cheers