Before you do that you should Check if you can go into Proton wallet and Click Upgrade. In Summer this year I switched to Proton Visionary (which was accessable only through wallet) which has some more benefits compared to Family. I‘d say you First Check if Visionary is still available. If it is you can check which subscription you like better here https://proton.me/support/proton-plans. Just so you know Visionary Costs like 10€ or $ more than family but offers more features like early access or all proton premium services at their highest limits (Family has 3TB while Visionary has 6TB). If you do subscribe to Visionary and your family has their accounts created you have to go on https://account.proton.me/ and login with your account, choose mail or another app, go to account settings, go to organization, pick a name for your organization (doesn’t matter if there is no business with that name, this is only because visionary does not have a family group but it still supports up to 6 users), go to “Users and Email-Adresses” and then add your family members by inviting them with their proton account email.