a lot of questions about exercises

[dirk101]

i was directed here by someone over at the men's health forums. i have so many questions going through my mind, i might come off as incoherent. sorry in advance for my grammar.
i'm 15 years old and live in romania by the way.
i am affraid of staying short if i weight train. bones grow untill you are 18 and all. people have told me that lifting weights cannot stunt my growth IF i lift weights right. but i have noone to coach me. there are very few gyms around, and they are very expensive. so if i start lifting weights wrong, i'll keep going wrong.
anyway, this is not my real problem. i am pretty fit right now anyway so i'm not doing it for my health, just for the looks. i'm in no hurry. so i mean to stick to exercises that work without weights. pushups, chinups, dips, that sort. are they better since they do not use a certain group of muscles but more at once, unlike using weights? i don't know so i'm just asking.
so here's my question. what would be a complete list of this kind of exercises? or is there any site where i could find such a list?
which exercises are for strenght, and which for stability? i read i need bowth.
i've also read that if i do a certain exercise for too long my muscles can accomodate to the movement and the small stability muscles can atrophy. that only SOUNDS scarry. how can i keep this from happening? i know i have to vary the exercises, but how? at what intervals?
how should i train? do reps until i feel the burn, or is there any other way, since i'm only working with my own weight?
i'm practically doing full body workouts, so i do it once every 2 days, no work on saturdays.
i've read that if i workout my lower back, i have to give it 48 hours to recuperate. don't most of these exercises use those muscles? does it mean i have to exercise every 3 days?
something more specific. is a situp just a continued crunch, or do they work different muscles?
i'm sorry if any of my questions have been previously answered. i don't have time to do a search, otherwise i would. i am very grateful for any help anyone could give me. if you need more information on my part, just ask.

[DiBatista]

Here is a good site with alot of exercises, pictures, and videos http://www.bodybuilding.com/fun/index.html

Almost all compound movements(movements that require more then one bodypart or muscle group working)will work both stability and strength, stick to those in the begingin.

"i've also read that if i do a certain exercise for too long my muscles can accomodate to the movement and the small stability muscles can atrophy. that only SOUNDS scarry. how can i keep this from happening? i know i have to vary the exercises, but how? at what intervals?
how should i train?"

That is true. It is good to mix it up every couple of weeks. To vary them, simply choose another exercise that works the same general are. for instance, instead of doing ez bar curls, do some one arm curls, or thick bar curls, or preachers.

"do reps until i feel the burn, or is there any other way, since i'm only working with my own weight?"
Under the faq section there is a full workout for using just bodyweight, you should check that out as it will answer these questions.

"i'm practically doing full body workouts, so i do it once every 2 days, no work on saturdays.
i've read that if i workout my lower back, i have to give it 48 hours to recuperate. don't most of these exercises use those muscles? does it mean i have to exercise every 3 days?
something more specific."

Most muscle need 48 hours to fully recouperate(i beileve the calfs and forearms might be less, dont take my word on it). So doing your full body workout every two days is correct.

The best thing you can do is to get as much information as possible from different places, find out what works for you through experimenting, and stick with it.

I noticed you didnt mention your diet and thats something that is very important and you should research that as well.

This site, www.t-nation.com, and the aformentioned site are the best i have found on the net to find realy solid training advice without having a product shoved down your throat, so make sure you soak up all the knowledge you can.

Good luckin your training.