how do teenagers do this?

I am watching the baby basically run the show everyday---as far as setting a schedule anyway. She goes where we do at this point, but we always need to be prepared. I am reading online and wherever about starting a routine for bedtime, but I don't know how to do that. Among other things, here are the things I am so completely unsure about and wonder how the 17-year-olds seem to be able to raise the unwanted pregnancies...

-so nothing in the crib and I am now terrified to put a blanket anywhere near her after reading about all of the kids suffocating. So, onsie is too cold, pajamas are hopefully not too hot? Sleep sack definitely too hot. Grandma says all blankets are fine. (AND keeps mentioning that it's a shame we can't put her to sleep on her stomach--yes, she's watching her on Fridays when I go back to work)

-eating amount is based on weight, but she doesn't go to the doc til the end of september. I guess I can try the bathroom scale since she never says "hey, can I have another ounce?" Who knows if it will work...?

-is it worse to be in a bouncy seat all day or to lay on her back? She's gotta be bored....

-what time IS bedtime? We are trying for 10, but does that mean she'll get up at five? And not to complain, but is it bad that she sleeps seven or eight hours sometimes? when do we give her a kid bedtime, like 8, and do we still feed her at 10? If she eats every three hours, we have to in order to get to the magic amount of formula.

-she always rolls on her side when she goes to bed. Of course I read that's bad. She doesn't listen to me.

-why does everyone always ask if she's sleeping through the night anyway?

-how the hell can the same toys dangling in front of her provide her with hours of entertainment? And sometimes they actually piss her off.

So there are so many uneducated people with kids....granted some give them kool-aid in bottles, but most of them seem to do it okay. I am more paranoid than most and am still in constant fear of something happening to her--but I think that's because of all the shit we went through to get her here. I guess it's a constant learning process....I just need to be told that everything is fine.