Waiting Period of widow or divorcee

No, as this is not a necessity.

This is up to you. However, islam encourages that a widow remarries if a suitable man proposes to her.

She can work from home and host guests when they come. Kindly follow the link given: https://www.assimalhakeem.net/the-iddah-of-a-widow/ [1]

By doing your obligations, refraining from sins and being kind to others. Yes can make a schedule for yourself to acquire Islamic knowledge and memorizing the Quran which by it you can become a student of knowledge in few years time and share this with other women.

1- If she is unable to continue living there, she can move out. 2- This is possible but this depends on whether the deceased has a real brother or not.

Her iddah is one monthly cycle.

1- It is calculated by the lunar months. 2- She can’t attend Quran classes outside her home. 3- She must not visit her daughter at hospital.

Yes, she has to observe iddah for a period of 4 months and 10 days. She cannot travel during the Iddah period or aftewards without a mahram.

She must stay in her husband’s house which they lived in and it is prohibited to apply any adornment such a henna and she must not mix with any non mahram!