I can’t open my note lock

Apple uses secure data encryption to protect your data, and the password is used as the key to encrypt and decrypt your data. As you would want to happen, anyone without the password cannot access the protected data. And as you seek here, Apple did not build in a backdoor and did not undermine the data encryption. No password means no data. You’re going to have to remember the password. Attempting brute-forcing of the password can take decades or centuries too, for a robustly-selected password.