How to store my coins secure and 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 I lost then how can i recover it?
if u lost your wallet means u cant recover it unless wallet data
for this reason we should copy the wallet data in separate device
if in case in future Ur system got crash or got some problem means u can recover the wallet in other system through this wallet data
one thing who ever download the wallet firstly encrypt the wallet with password by doing this nobody can access your wallet without password
it will be safe from hacker or theft