I have sinned a lot over my life and I have now returned to Allah (SWT) but I’m not sure how I can ask for forgiveness for such huge sins.

1- Continue to asking for forgiveness and feeling regretful
2- Be hopeful that Allah will forgive you
3- Compensate for those saying by making up missed obligations like prayer
4- Pay charity and ask Allah to accept it and to forgive your sins
5- Use the body parts you sinned with like your eyes and ears and hands to do good deeds with them, such as using the eyes to read Qur’an and seek knowledge
6- Go to Hajj or Ziyara of Imam Hussain (a). It washes away one’s sins