Try following a keto meal plan, there are some good free ones, this is from I Breathe I’m Hungry, include recipes, shopping lists etc.
Atkins.com still has free Atkins 20 for foodies and Atkins 40 for foodies, again what to eat and shopping lists. I have used both and as long as you don’t do the shakes and bars mentioned for snacks from Atkins, it will work for getting you into ketosis. It does take some longer than others to get there, If you have been ill, your body is healing from that, illness results in high cortisone levels that alone can keep you from losing.
I try not to consume sugar alcohols, that is why I never use bars and shakes anymore.