I have plans of investing $400 in Crypto now my challenge is which coin should I start with, considering different coin scattered across different exchanges. I no of Bitcoin and Etherium but where to buy from and how to start is my challenge.
Bitcoin will be preferable to start with, but this is not a question that anyone should answer you, because it is your money, you have the responsible to check the price history of many cryptocurrencies and invest on the one you think it is of your choice that will make you profit . Make your own research using cryptocurrencies price history and do not invest on shit coins (low volume coins)
If I succeed in buying where do I store the coin, which of the wallet will be safer for me.
Hardware wallet is the best, your private key is offline, but still make sure you protect your coins by protecting the device used to operate the hardware wallet making sure it is not having malware. You can use electrum to operate the hardware wallet, Trezor will be the best hardware wallet to use as it is open source, but ledger nano is good but its secure element is close source. If you want to use Trezor, make sure you use passphrase along.
I still don't understand how this coin appreciate and how I can make profit by just keeping a coin without doing anything with it.
The price of the coin multiply by the amount you invested.
Is binance reliable. And how do I buy from there. Is it a company, a website or an app? If I decide to buy will there sell to me and how do I use the app? Is it easy to use?
To hold cryptocurrencies, binance is not recommendable, you need a wallet that can generate you private key, binance is just a centralized exchange that do not give you the complete control of your coins because they have the private key, not you. Not your key not your coin. If you have any funds on binance and want to hold, better move it to noncustodial wallet like electrum. But, for best security, offline wallets like hardware wallets are better, preferably Trezor. Binance is for trading cryptocurrencies, or buying, but some people still even prefer to make use of decentralized exchanges like bisq to buy bitcoin. If you want to buy cryptocurrencies on binance, know that it is centralized and custodial, move your funds to noncustodial wallet after.
https://www.binance.com/en/blog/318034612921425920/How-to-Buy-Bitcoin-A-Quick-Guide-from-BinanceFor privacy, I will suggest you to use decentralized exchanges like Bisq
https://bisq.network/