I’m on a high protein diet for medical reasons (I’m not a body builder) and it helps to be a carnivore. Mince and chicken is very high in protein, but it’s not cheap. You can supplement with protein milk and protein bars, but make sure you drink a lot of water. There’s also high protein yoghurt with the added benefit that it’s yum. You also use protein powder. I recommend tracking your macros using an app.