Specific process:
First, choose a regular travel agency.
You have to go to the travel agency to choose a good itinerary first.
Be sure to ask questions you don't understand.
When signing a contract, you must read it clearly.
There are many kinds of insurance. Ask the travel agency what insurance they bought. If there is no insurance policy, be sure to write it clearly in the contract.
Confirm the departure time and place.
Leave your own phone number and the phone number of the travel agency, and be sure to keep it open. It's best to leave more phone numbers and let the travel agency inform the group in advance.
When you leave, you can search on the internet for matters needing attention, folk customs, geographical features and so on.