How do I get all the starter Pokemon in Sun and Moon?

"Its," because "it's" is a contraction of "it is" and "its" is possessive.

No; you're appreciating nature, not worshiping it. You're celebrating a gift from God and thanking Him for the beauty of the night.

You have to proceed far enough into the story to get to Poni Island. From there, you have to enter the Steelix house and exit out the side door. There...

You cannot catch a wild Rotom in Pokemon Sun or Moon. It must be traded through the Pokemon Bank from another game.

It can depend on the game, but generally you have to groom and feed your pet regularly and win battles. Make sure you find out which food your Pokémon likes...

Go to Paniola Ranch or Route 4 and run in the grass for a while - you'll soon come across a cute little Eevee!

You can find both forms on Pony Mountain. During nighttime you will find the midnight form of Lycanroc, and during daytime you will find the Midday form.

Ask a friend with Sun to evolve it for you.

If you're playing Pokemon Moon, it should be night in real life and day in game. Then, the portal will appear.

You could either trade (using the GTS, online connection, or by asking a friend) or use the Pokébank to transfer it from another game.