Depo shot

Sooo I'm 20. Had my 2nd child 9 months ago & I'm EBF (exclusively breast feeding) I've lost ALOT of weight from breastfeeding and I'm a little depressed about it. Also, I don't want anymore children right now and I'm looking to get on birth control. I was thinking maybe Depo because I hear it makes you gain weight. I was thinking maybe being on it a year than switching back to the pills. I kinda want your advice? Anyone here been on Depo before? Did you like it? Did it make you gain weight?