How to use Twitter
READING from Lists:
Twitter App: From your twitter profile page click GEAR icon, then Lists.
Browser: From your twitter profile page click the LISTS button.
ADD or REMOVE people to/from your Twitter Lists:
Twitter App: To ADD a person, go to their profile page, click the GEAR icon. To REMOVE a person, go to YOUR profile page, click the GEAR icon, then Lists, select the list you want to edit (or click the + to add a new list), click Members, swipe left to Remove. You can also swipe left to remove a whole list.
Browser: To ADD or REMOVE a person, from the person's Twitter page, click the GEAR icon, then choose "Add or remove from lists...". Also your LISTS page will allow you to edit your lists and list memberships.
If you want to toggle between different conversations without loosing your place in one, or if you want to cut and paste text between conversations, you can either open a separate session in a browser (Safari or Chrome), or better yet, you can install a second app. A great Twitter app that I like is called Tweetbot.
Have others help you with your twitter account without giving away your login credentials.
Use TweetDeck (owned by Twitter). Use the "Team" feature.
You can find helpers at Upwork.com