Should a left-hander learn to play with the standard string set-up or should the strings be switched?
Whenever a guitar is properly strung, you want the highest gauge string closest to you. That makes reading tabs easier for one, and if you're showing someone something on guitar, having the same string setup is very essential. However, you CAN switch the strings if you want to, explore new terriotory I guess.
Thick strings should always be closest to you, especially since it's going to be essential with palm mute riffs.
There's a good chance that what I've written above is useless and if you take any of the advice it's your own fault.
Just learn guitar right handed. I can tell you as a lefty who decided to learn right handed, it will make your guitar life somuch easier.