Hmm. Okay. Let me see. Well, first of all, I’ve been dancing ballet since I was three, and it doesn’t necessarily have to be immodest. Of course, I’m not Jewish, so we might not be talking about the same thing. But also I haven’t even heard of hammer toes. *looks it up* Oh. Well, I’m not an expert so take my advice with a grain of salt but, I don’t think that’d be a problem unless you danced en pointe, which you wouldn’t do until you were more experienced at ballet anyway. (And even then I think you would be okay. I dance en pointe and don’t have problems.)

As for learning...if I were you, I’d probably search online for ‘beginner ballet tutorials’ and such. If you could find basic/beginner barre exercises (plies, releves, tondues, etc.) (and you can use a chair or table or a post or pretty much anything in place of an actual barre if you don’t have one) that would be the best thing to start with I think. Another thing would be to pay close attention to the videos and yourself to make sure you’re doing the movements correctly so you don’t injure yourself. Also, make sure you stretch well before dancing to avoid injury (you can look up videos for stretching, too). But my best advice would be to look up those tutorials (I just googled it myself, there are plenty of videos). 

I hope this is at least a little helpful. Good luck, and if you have any other questions feel free to ask me!

Alright, well, I don't do ballet, but I do Irish dance. In my experience, many dance studios offer beginner classes that you can take without having to go, like, all in. BUT even though I'm Jewish I don't really know what tzniut means (I'm assuming you're Orthodox or something) so I can't really help you with that part of it, sorry!

And about toe/foot issues, I think if you don't try to be a really active dancer, like trying to win competitions or get into the performance or whatever the equivalent is in ballet, you probably won't need to worry about that too much. My feet were pretty not-hurt and not-ugly for a while after I started dancing before I reached the point where you have to practice every day and wear shoes that are too tight to make your feet look better (don't worry, you don't have to do that!).

I think YouTube videos might be a good option, as um, the other person who commented :), said. Just be sure to stretch!

Youtube is a great place to start, they have tutorials for lots of basic moves and the names of the different positions. Tzniut isn't necessarily a barrier. Look up Mina Black, who runs a dance studio for orthodox girls on Long Island. She's really cool!

Saying "enough that my body is ruined" is a little extreme, too. Dance is really just a sport like any other. As long as you stretch and take care of yourself, there aren't any problems. 

I'm Jewish too, and keep tzniut, so I get where you're coming from. It can be really hard adn annoying sometimes.

I don't know if this is an option, but maybe you can ask a place if you a can wear a skirt over your leotard to class. But then there's also performances with men in the audience and very un - tzniut costumes. So that might not work. 

But for online, Youtube is probably the best place to learn from. You could probably find some good tutorials. Just make sure you have a good place to practice. I'm not really sure what hammer toes are. *Goes to google* Unless you are en pointe, that probably won't happen to your feet. I think. 

Hope this helps!