How to lose the weight

Im currently 8 months pp and want to get back to my prebaby weight. I have two kids. Before I was 150-160 and now im 180-185 and im stuck!!! How do I get this weight off. I keep trying to do keto and I keep falling off because I dont see any weight difference on the scale. Please help this momma out!!!! Also if you use a weight trainer which one do you recommend and actually helped!! Thanks so much!!!!!!!!