WordPress Affiliate Plugin Setup + Admin Panel Replication (Simple Task)

I have two separate websites hosted under the same hosting control panel:
1. Online course website
2. Another application which already has a working admin panel
Both are independent systems but hosted in the same environment.
I need help with setting up an affiliate system and replicating an existing admin panel.
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Scope of Work
1. Replicate Existing Admin Panel
• Application system already has a working admin panel
• Replicate the same admin panel into the online course system
• Use the same UI and logic (no new development required)
• Only minimal adjustments (paths, DB connection, etc.)
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2. WordPress Installation for Affiliate System
• Install WordPress in a subdomain or subfolder
• Perform basic secure setup
• Install and configure the purchased affiliate plugin
• Affiliate registration and login should work properly
• “Become an Affiliate” button should open the affiliate portal in a new tab/window
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3. Minor Website Updates
• Small content/text edits
• Link updates
• Minor frontend corrections if required
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Important Notes
• No major development required — mostly setup and replication
• Existing systems must not be affected
• No database structure changes unless discussed
• FTP and database access will be provided
• The Current website is not in wordpress. Wordpress needs to be installed in server.