Being proud of one's achievements

Q: Allah Almighty has blessed me and I have become a doctor. I am so happy and I have worked so hard for it and Allah has blessed me, so I would like to tell everyone that I have become a doctor and be proud about it and receive congratulations. Should I be humble and not tell anyone or there is no wrong in doing what I am doing? I dont want my Allah to be sad with me.

Repeating a verse of Surah Faatihah while performing salaah

Q: I heard in salah, errors to do with waqf dont matter. Does this apply to stopping in the middle of a word and then resuming?

I attempted reciting waladhaleen twice and every time between the ‘leen’ part, my voice stopped because of an obstruction in my throat. However, the third time I tried again and the same thing happened, after the pause, my voice came back a second later and finished reciting the remaining letters. Because I paused abruptly, is my salah fine?

Working as a data statistic analyst in a media advertising agency

Q: I am currently unemployed in Australia as I recently migrated and now I have got a job offer in media advertising agency as a Data Statistic Analyst which involves working on Microsoft office and other data tools.

My query is, as the company deals with video advertising and media work so will my rizq be halal? Islamically am I authorised to work in such organisation? 

Using black dye

Q: Because of the colour not catching the hair, is it permissible for a person to dye the hair black and later on (few hours later) go over the black dye with another colour?