Before I start, I have only employed very recently. However, Chatgpt is my first choice so far. Its really quick in summarizing information and the more accurate the prompts are, the more simple it is to understand the information as well. One thing I love is especially in cases of data analysis, ChatGpt lays out information step by step. So far, it has helped a lot with analysis and job applications as well.
For visualizations, Excel is my go to tool because it has supported me with my requirements so far, however I am eager to learn Power BI as well.