Hey,
If you're really fascinated to switch to the dedicated server, I suggest you first know the basics of the dedicated server plan resources such as a number of CPU cores you might need for good performance, how much RAM you require and the storage amount.
Also, the key difference between the VPS and Dedicated server are the restrictions placed on who can use the server resources. In VPS, the multiple numbers of websites share the server resources present on the single physical server, however, dedicated server resources are fully dedicated and allows full control over the server resources to fulfill your requirement without having to face much trouble.
In addition, you can do a lot using dedicated server such as host game servers, increase site load speed and performance, create several resellers and shared hosting plans to run your own business, gain high security, will be able to handle the high upsurge in traffic and many more.
Hope you find it useful!
Regards