You can use this tool to find the best platform based on where you live to purchase ETH ➡️ https://ethereum.org/en/get-eth/
Exchanges such as Coinbase provide an easy to use interface to convert your fiat currency into cryptocurrency. Coinbase is a secure platform that makes it easy to buy, sell, and store cryptocurrency such as Bitcoin, Ethereum, and more.
If you don’t already have an account set up with Coinbase, you are able to do this by these few steps:
Head to www.coinbase.com and you will be prompted to enter your email address to get started.
Follow the instructions on the Coinbase website to create your account.
Once your account has been approved and finalized, this is the place where you are able to buy ETH and send it to your connected wallet.
You can follow the steps provided by coinbase on how to send your crypto to your wallet here ➡️ How do I send crypto to another wallet.