increasing difficulty in bodyweight training

I have been doing the same pushups and squats for almost two months and now they feel quite easy. How do I make my home workouts more challenging without buying weights

Increase your reps slowly

Try slower movements and controlled negatives

You can try harder variations once your form is good

Single leg exercises can make things more challenging

I started doing incline and decline pushup variations

Reduce unnecessary breaks between sets if appropriate

Try adding another set to your routine

Dont increase everything at once