First of all, brute forcing BitLocker drive with adequate password is definitely a no go. Modern CPU / GPU based attack vectors will take stellar amount of time to break the encryption. But if you still want to hit your head to the wall, be my quest!
Encrypting hard disks after VeraCrypt installation is quite trivial procedure. At first you need to start the encryption wizard by selecting System -> Encrypt System Partition/Drive.
Checking TPM-Module When implementing BitLocker you need to first check if the computer has the TPM-module. In Windows 10 you can check that by writing “tpm.msc” in the search box.