@James W Slaughter III
IF, you can see the "Help Others" 'Icon'; THEN, you are a Member of the Church.
'Yes', the "Help Others" function/facility/feature enables you to basically "Log In" AS the User/Patron you are helping.
You CANNOT do EVERYTING, that the User/Patrons can do with their Account; but, you can certainly act as their "Proxy" in doing most things.
Remember, you basically SWITCH this "Help Others" function/facility/feature, ON; and, OFF, each time you use it - you have to go through the same "Access" process each time.
The number that you "Enter" is actually the "Helper Number" of the User/Patron that you are helping.
You have to obtain that "Helper Number" of the User/Patron that you are helping, directly from that person you are helping.
The "Helper Number" for individual Users/Patrons can be found in an individuals "Settings" (under the "Permissions" 'Tab") in their 'FamilySearch' Account.
The person that you are helping will have to look in their "Settings" (under the "Permissions" 'Tab") in their 'FamilySearch' Account to find out what that (Helper) number is; and, then, advise you.
Here are some "Knowledge Articles" in 'FamilySearch':
How do I use the Help Others link in Family Tree?
What does a Helper do?
Where do I find my helper number?
Where it states:
A helper number is a unique 5-character number associated with your FamilySearch account. It, along with your username, allows a helper or support person to see your Family Tree and assist you. You can find your helper number using the website, Family Tree mobile app, and Family Tree Lite.
Helpers can do everything you can with a few exceptions:
As an aside ...
You can also use the "(Consultant) Planner".
The "(Consultant) Planner" ALLOWS you to keep a User/Patron, that you are most often "Helping", in the "Planner" for a period of x12 Months, after which you need to "Renew" the permission.
IF, you have any 'Question' regarding the "(Consultant) Planner"; THEN let us know; as, that is another separate "Discussion", better to process one thing at a time.
I hope this helps.