I followed 30 Days fitness challenge app . It's just great. It has easy medium and hard levels of workout schedule for 30 days. It's completely up to you to be working out 30 days and see results. Highly recommended
You can follow a lot of them on YouTube like Sai aerobics, blogilates, lilly Sabri. I am also following their workout routine it has helped me a lot. You can totally check them out on Instagram too.