Change of Id

First of all you should never let anyone use your Apple ID.

Apple ID is never meant to be shared.

Each member of your family should have their own Apple ID.

You can share your apps, books and music purchases using Family Share, read here: Set up Family Sharing - Apple Support

You can't change the existing account without affecting the others. If you want to leave the existing account as is, you will have to create a new Apple ID. You will lose access to most of your data and all your purchases. ckuan's suggestion is a much better way.

If your family members are 13 years old or older.

Apple ID - create a new

Apple ID – Create

If they are under 13 years old, you will need to set up Family Sharing to create an ID for them.

Family Sharing and Apple ID for your child

Family Sharing

Family Sharing - Set up

When changing to the new ID, there may be some data loss, but they can minimize it. If syncing photos with iCloud, ensure Optimization is turned off in Settings/Your Name/iCloud/Photos and/or in Photos/Preferences/iCloud. Then make sure full resolution photos are on the device/computer. When signing out of iCloud, if asked whether they want to retain data, choose yes. Messages conversations will be lost if they are addressed to the ID. See the article below for other places that the old ID should be removed. See Winston Churchill's response in the below discussion. Also set up Family Sharing to keep access to your apps/purchases. 

How to transfer all files from one iCloud account to another

Apple ID email address or password - What to do after you change

Didn't you read?

It's not advisable to let anyone use your Apple ID, you will have many more problems down the road.

In short, don't do it.

Setup Family Sharing and let everyone (6 members inclusive) have their own Apple ID.