I desperately need to go bra shopping but have no mom to help?

My mom passed away a year ago, and I have been putting it off because I don't want to go alone. I'm 16 and really, need to get new ones. Call me a looser, but I am kind of nervous to go. Where do you recommend me going? (I'm not too worried about price). And then what styles? Like push-up or strapless or are their even normal ones? Or colours? Do you try them on? How do you know what size you are? I measured myself and googled it and I think I'm a 32B.. And are the people helpful? I'm sorry for my slew of questions, I'm just nervous to do this alone and I don't have an aunt or anything that would come with me.