Should I get Lifetime Premium

I am not a Dr. Bright alt. I want to make maps

If you like Map making or you're actually good at the game then yes. If not, no.

The two main advantages of the premium for which I bought it are: the creation of maps and the possibility of starting a game on your own maps or those of some other player you like as well as the possibility, if the author allows it, of copy a map you like, make the changes you like and then play with it
If these two things interest you then get it