always keep in mind that HIS being in recovery is not something you need to DO anything about. educate yourself yes, but there is no involvement required on your part - especially with someone you've only know for a few weeks!
treat his recovery the same as if he played guitar, was a triathlete or had hammertoe. you wouldn't need to take up the tambourine, start running 40 miles a day or enroll in podiatry. those would be HIS things.
take it slow, see how things go. remain fiercely unobligated.