You can easily buy Bitcoin via several websites or even offline from a Bitcoin-ATM. We suggest you to start with bellow websites for buying bitcoins with credit/debit cards:
Buy crypto from Blockchain.com
- Register and create wallet from: https://login.blockchain.com/#/signup?showWallet
- Log in to your Blockchain.com wallet.
- Click Buy Now in your browser or Buy & Sell on mobile.
- Select a crypto like Bitcoin.
- Enter an amount and select your payment method.
- Click Preview Buy.
- If everything looks good, click Buy Now.
Buy crypto from Coinomi.com
- Register and create wallet from downloading app: https://www.coinomi.com/en/downloads
- Buy from app or from website: https://www.coinomi.com/en/buy/simplex
- Select payment method and buy.