ketosis

Help?? I only eat pork, egg, and veg, and peanut butter but i cant get into ketosis? I feel like im gaining weight. Bfast : (cant prepare anything) almonds nuts (<4g carbs) Mid: tofu and 2 egg Lunch : pork egg veg Mid: peanut butter Dinner: pork egg veg Help?? Im 15 and 123lbs.

what do you eat to get into it how long can you stay in it and how do you get out of it??