how do you git apples

Realm > Marketplace > Barter > Apples

To purchase apples for real money.

Or...

Realm > Marketplace > Barter > Search > Search for apples

To purchase for in game mushrooms

Or...

You can sell stuff like art/wolves/items for apples or ask/check forums and sale chat for any available apples members are selling.

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Apples are usually equal to about 1000-1500 mush so the best advice I have for you is save up, explore, sell things, and when you have enough mush, you can go buy apples with them :)