I'm kind of scared holding the coins myself, I'm not very good with computers and security. I think a billion dollar company with expensive security will be a lot safer.
No, It's Not. Hacker was more interesting on billion dollar company than user dekstop wallets.
One they hack a company, they can take a billion dollar.
Except, you do personal mistake like enter your private key to phising web.
Is it the best way for me to store my crypto into Hard Wallet everytime after my trading?
Maybe a hardware wallet or a desktop wallet. Start by getting familiar with applications like Jaxx maybe, then after you get the hang of it download core wallets, then hardware wallets
Yes, I think this is the best solution. I'll add link below to make you easier to do the solution :
Jaxx Website :https://jaxx.io/
Jaxx Tutorial :
https://www.youtube.com/watch?v=c6cC7HHNMmMBest Hardware Wallets
1. Legder Nano S ($60)
2. Trezor ($99)
3. Keep Key ($99)
Check review :
https://coinsutra.com/best-hardware-wallet-bitcoin/Be Carefull, Keep your money safe!