Seamless WordPress Hosting Migration

I need to move my static opensource.sa site from a custom hosting environment to wordpress.com hosting. The installation is completely standard—no bespoke plugins, scripts, or configuration tweaks—so the job is purely a lift-and-shift exercise. I do not want any design or content changes made during the transfer; the site must look and behave exactly as it does now.

Key objectives
• Copy all WordPress core files, themes, media uploads, and database without corruption
• Re-establish existing SSL and permalink structure so every URL resolves correctly
• Point the domain’s DNS to the new server.