I'd recommend using an exchange service such as Coinbase or Binance. However, these often require you to verify some personal details so if you don't want that, you can try Changelly or ChangeNOW. The problem with these is that they might have higher fees, a minimum deposit limit, and don't support less popular coins.
If you don't like any of the options, let me know and I can do the exchange for you.
I think shapeshift is one website that allows you to do pretty much everything for most of the popular coins. Though dogecoin is getting some traction. I'd rather invest into better coin like say even the ETHER. So if you want try oout bittrex, shapeshift and also blocktrades if you want. I have used them and experience is so far not so bad.
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