Well your wallet is where you keep your coin safe and it always important to protect it
One of the best way is to protect your private key never give it out to any one even if it's your mentor that is very important
This is for new guys like me
You can also try some different ways of logging in into your wallet. In myetherwallet, there is a feature where you can login offline, and also through the use of JSON file, just upload the file and enter a password, through this, you can log in without the need of your private key.
My kind of wallet I am using allows me to log in using QR code which is more easier. That is just one way of logging and I find it easier. One thing I like about how this qr code is that it is packed in a encrypted archived folder so no one coyld have access to it even malware. Find HODLER wallet and see for your self their secure backup called HSB, this feature gives importance on how to properly keep tge private key.