Following the above steps is the best way to protect your YouTube account from hackers. As long as you refrain from sharing your login info, grant the correct permissions to other accounts that might manage your account, and have a solid 2FA method enabled. That's all you really can do.
Of course, there are ways and means around all of these safety features, but if you're a small channel it is unlikely anyone would go through the effort to circumvent these safety features to gain access to your account.