As an accomplished senior Linux/Windows system administrator for over a decade, I bring with me specialist skills well-suited to your MySQL 8.0 server start-up issue. My knowledge in MySQL server management, including version 8.0, is extensive and complemented by my ability to navigate and manipulate MySQL configurations. This should enable a swift and accurate diagnosis of the root cause of the failure to start your server. The familiarity I have built with LAMP installations on Linux during my career will be valuable in this regard.
Additionally, I've had experience managing not only shared and VPSs but also set up servers using control panels like cPanel, Directadmin, CWP, Plesk, and VestaCP. This roles necessitated resolving a wide range of server-related issues under time constraints such as yours.
Lastly, I understand that you desire timely resolution. With my methodical yet efficient approach, I assure you of not only identifying the issue but implementing effective solutions within the shortest timeframe possible. Please feel free to contact me if there's anything else I can clarify or assist you with in regards to your project.