Shopify Store Transfer Specialist

I'm looking for an experienced Shopify expert to help transfer an existing store to my onwership. I have the logins from the previous owner but I cannot log in because of the authenticator app being linked to the old ownership.

Key tasks include:
- Transferring products, inventory, customer data, and store design/customization.
- Assisting with transferring payment gateways, shipping platforms, and marketing tools.
- Basic setup of the new owner's Shopify account.

Ideal skills and experience:
- Proficiency in Shopify store setup and management.
- Experience with app and integration transfers.
- Knowledge of payment gateways and shipping platforms

Please provide a detailed plan and previous experience.