But I don't know about wallets. I don't know how to use wallets properly. Which wallet should I use to invest in Bitcoin? And what should I do?

I want to know about wallets.
You don’t use a wallet to invest in Bitcoin; you use a wallet to store and safeguardyour Bitcoin, and the best wallet you can use and that’s recommended is an open-source wallet. You can go for
electrum wallet,
BlueWallet Electrum Wallet or BlueWallet, which are both mobile-friendly wallets and easy to use.
Thank you for sharing this, I am just getting to know about Electrum and blue wallet. I will get those. I focused on bybit and trust wallet.