LAM or other birth control?

Hello! My partner and I are having sex again, after quarantine, yeii! But I need some advice for birth control. I tend to gain weight with all hormonal options. But yesterday, I got inf from the clinic regarding the Lactational Amenorrhea Method. I think all the conditions apply in my case, but I feel unsure if it works. Does anyone use this method? If not which other are u guys using? Also, I don't want to use any long-term method as we are still deciding if we want another baby. Any advice will help!! TAI