Now a days every second person is searching for a way to buy Bitcoin via Credit Cards but most of the exchanges does not support buying via credit card. In this way you can go to link below in post.
Spectrocoin is an exchange that supports buying from multiple platforms i.e. Credit Card, Vpay, Skrill, bank deposit (if you are living in UK) and few more.
My favourite is SKRILL as there is low fee on it. You can buy Dash Coin and Neo (XEM) also.
All you have to do is to signup and submit your ID Documents for verification. They normally take 7 days to verify if you want to do it early just chat with them and they do it early.
You can buy crypto currency from this exchange and then transfer it to other exchanges like bittrex, binance or others to start trading.
If you need any help in this regard I will be happy to help you.
https://spectrocoin.com/en/signup.html?referralId=4055985375