Start with the immediate question
The first task is to clarify what support is needed now. Ask about assessment, possible withdrawal concerns and the proposed first appointment. The longer-term plan can be developed after the situation is understood; you do not need to solve every problem before calling.
Make practical arrangements
Think about a private contact route, travel to the branch, work or family responsibilities and a trusted person who can support the appointment if appropriate. Ask which arrangements need confirmation and avoid committing to an unassessed programme length.
Define the next review
Agree one or two near-term goals and when they will be reviewed. Therapy and relapse-prevention planning address different parts of sustaining sobriety; the right combination depends on assessment.