First of all you should start walking regularly it's help alot...later on pelvic floor exercises..also back strengthening

Do abdominal exercise. See on you tube

Regular Online classes for postnatal cases, for regaining strength, endurance and flexibility are available . Let me know if interested

Consult online or offline for Proper exercises and guidance.

You can start with the following exercises 1. Pelvic floor exercise 2. Diaphragmatic breathing 3. swiss ball bird dog hold 4. walking 5. Glute bridge 6. Post partum planks 7. Cat cow pose. If you can do at your own start with this exercises or for a first 10 days perform it under expert supervision to avoid any discomfort and pains.