PHP Site Data Consolidation

I need to merge two nearly identical PHP websites, both under a WordPress theme with a custom code backend, into a single site. The goal is to combine user data, order history, and commission payment records under WooCommerce/Stripe. This will streamline operations as we currently manage two websites.

Requirements:
- Migrate the following user data:
- Login credentials
- Order history
- Commission payment records
- Client information (e.g., address, phone, etc.)

- The combined site should be built on the existing platform without any design updates or changes.

Ideal skills and experience:
- Proficiency in PHP, WordPress, and WooCommerce
- Experience with data migration and backend integration
- Familiarity with Stripe and handling user data securely

Please ensure that all data is accurately transferred and that we maintain the current design.