Tips for getting my sister to lose weight?

She wants me to train her. I took her running this morning and made her do some HIIT. She is 5'5. Idk how much she weights because she won't tell me. But i think she could stand to lose like 30-40 pounds. So what are some other excercises that would be good for her? She wants to do some weight training but i only know like weight training for dudes. Whats some stuff that she can do? Girl pushups/bodyweight squats/etc... And any other tips would be great. Tryna get her to lose like 20-25 pounds by the end of summer.