If you really don't need the job, and there's a good chance the job will stress you in a way that puts your sobriety at risk... well... you have to think about it really carefully... analize pros and cons...
I understand you, I need a focus in life too... a purpose... and I really don't think I can fulfill the purpose of life in a job ... I'm still lost in that matter.
Seriously, don't take any advice from me as regard to job and work and carrer ... I hate to work and I'm a loser.
Hope you make the best decision for your develpment and well being, my friend.