Shapeshift.io is great however you will pay premium fees for transfers. But its one of the easiest ways to purchase. But beware. Sometimes their transactions lock up and you need to file a complaint with them. If your going to use shapeshift always keep the email transaction and don’t delete anything until after you receive your transacted coins. I have had to email them several times for missing transactions and every time they come thru a day or so later. It is a hassle tho and you need alot of the info, including wallets, transaction number, blockchain identifier etc. You will see complaints on them online but honestly I’ve never had a real issue that wasn’t resolved in a couple days max.