Questions about Softball?

I am playing softball for the first time this fall. I have played baseball for 4 years and I want to try softball is it like baseball or totally different? Also I need to know all the gear that you need to have to be fully prepared. I have a baseball glove that I can catch a softball in so can I use that? I found a pair of men's nike baseball cleats would I be able to use those the spikes arent metal their like rubber or something? I would like to know what position would be best for me. I have ok speed, a semi-good arm more on the good side I think and good reflexes. I am a 15 year old girl by the way. Thanks For the help