How to store my coins secure and safely ?
by doing encryption then your wallet is safely
You should always create backup of your private key, You can keep copy of private key on a USB drive but be careful, One more way is to print out the key in form of digits or QR code and keep it in a safe place be aware of little humans and animals as well. Famous crypto billionaires, use this method, but they chose more complex way, cutting up key printouts in a few parts and keeping it in separate bank wallets.
If we LOST permanently then how can we recover it? Is there any Solution for it??
Usually private keys can be recovered using 12 to 24 word phrase. which Make a backup of that phrase as well. You have to create an e-mail that will be used only for this wallet. Use two-factor authentication everywhere it is possible. You just need to get an app, that will generate passwords for your accounts and create one more layer of Protection. Pay attention to what exchanges you are using choose Reputable and secure ones to avoid bad experience. Update your software regularly, always get the latest version of wallet you use..
