Warnings shouldn't stop the gamemode from starting, make sure your config.json is correctly configured and you're uploading the relevant files.
In regards to the actual warnings, without seeing any code it's hard to figure out what is actually going on but generally they explain themselves fairly clearly.
symbol is never used:: "..." - You have a symbol / variable declared somewhere within your script that is not actually being used anywhere, it can probably be deleted or you're not using it correctly.
local variable "..." shadows a variable at a preceding level - You're probably trying to redefine a variable that has already been defined somewhere else in your code. Make sure you're scopes are correct and you're not redefinging a global variable.
Hopefully this is useful but due to the simplicity of these warnings, I would suggest learning more about programming before attempting to host an entire server and spending money on something you don't fully understand. Sadly, programming isn't just something you can pick up overnight (although a lot of people try) and it's better to figure out the basics using small applications or in this case a very small script that has basic functionality. Good luck!
In regards to the actual warnings, without seeing any code it's hard to figure out what is actually going on but generally they explain themselves fairly clearly.
symbol is never used:: "..." - You have a symbol / variable declared somewhere within your script that is not actually being used anywhere, it can probably be deleted or you're not using it correctly.
local variable "..." shadows a variable at a preceding level - You're probably trying to redefine a variable that has already been defined somewhere else in your code. Make sure you're scopes are correct and you're not redefinging a global variable.
Hopefully this is useful but due to the simplicity of these warnings, I would suggest learning more about programming before attempting to host an entire server and spending money on something you don't fully understand. Sadly, programming isn't just something you can pick up overnight (although a lot of people try) and it's better to figure out the basics using small applications or in this case a very small script that has basic functionality. Good luck!