Keto diet is terrible for you. You are losing weight because you are sick. It's the refined carbs and sugar that are not good, you just need to get them from whole sources with the fiber and all.
Stick to what you know because nutrition is not it.
Because?
It is possibly fine to be in ketosis for a little while (and it can serve a medical purpose), but you should absolutely not keep it up long-term.
As with all crash diets where a lot of weight is lost rapidly, the weight is very likely to pile back on when the diet is over.