Depends on what sort of underlying file system you want to use on the drive. For Linux filesystems (ext4, btrfs, zfs etc), here's a good start: https://wiki.archlinux.org/title/Dm-crypt
For NTFS, BitLocker is already baked in to Windows.
What are you talking about? Ofcourse everyone should worry about backdoors and other vulnerabilities. But I'm sceptical if bitlocker is the right solution.
On a serious note I use a lot of tools to circumvent those vulnerabilities.
Bitlocker is only redumentary included in the cheaper Windows "Home" versions
only the "Pro" version actually includes proper Bitlocker tools which is frankly a pretty stupid move