Hi,
I do have the same issue with Debian, but didn’t find any documentation that worked really.
as previously pointed out already you might look at the tor-instance-create man page
https://gitweb.torproject.org/debian/tor.git/tree/debian/tor-instance-create...
If you have specific problem people might be able to give more specific help.
Could you please let me know in detail what you did, if it is going well with you?