Short answer
Care for shirts depends on the chosen cloth and its care label. Ask the tailor for instructions for the exact garment; follow the label and avoid heat or cleaning methods it does not permit.
Wash and press to the cloth label; the tailor confirms the routine per fabric at the fitting. Rotating four to six shirts protects each one.
Follow the care label for the chosen cloth and ask the tailor if the instructions are unclear. Storage, ironing, steaming and cleaning advice can vary by fibre and finish.
The itinerary is a proposal: months are planned, dates and venues confirmed individually. Final quotations are confirmed in writing before you commit.