Trying to understand sleep training

Hi everyone. I’m new here.

My daughter is 8 months old today. Sleep has been all over the place and it definitely causes me anxiety. I’ve been considering sleep training for a bit but don’t even know where to start and have been dissuaded from it because of a breastfeeding group I’m in.

Can you share why you sleep trained and how you came to that decision? I’m just worried about the crying that will ensue and my milk supply (though I’ve never had an issue, but I keep hearing that if you don’t feed at night, supply dips a lot?) She sleeps in her crib, but I do nurse her to sleep for nighttime and naps and MOTN wake ups. She can’t fall asleep independently. Ever. She stands in her crib and cries until we come get her. Naps are inconsistent. I am exhausted.

Anyway, I’m considering TCB. Is it worth it? What would you recommend to us at this point?