What's a good password for my iPhone?

What's a good password? My name is autumn.
And how do you set your battery to show the percentage.
And how do you set an actual song ringtone to play when someone texts you?

1234:D

Not sure if you mean Apple ID password, in which case my password is the address of my work, try something like that because people can't guess that
But if you mean a combination code for the lock, try something that is easy to put in, for instance 0852 because it's just a straight line and easy enough to do if you're in a rush.

To show the percentage go to General --> Usage --> Battery Percentage

To change the text tone go to Sounds --> text tone

I always put my bday

Fall
it shows it so no need to set it up. Just go to settings or it might be a bar in the top right croner
i don't know