I came across a thread made by a jolly good fellow on his journey to being a data scientist(with machine learning proficiency),but I want to say the following.

I have gone through most of the thread from 2019 and I must say kudos to you bro.
but I have some things to say for clarity sake.

Anyone who wants to delve into data science needs not have a full grasp of EXCEL,this is because all waht Excel can do and even more pandas, numpy and matplotlib(and seaborn) can do it and even more (analysis, numerical computation and visualisations),there are other modules built on Python that can do extra excellent jobs too that are far better than excel.

With pd.read_csv('name of file')
You can import a file into your notebook

With filename.describe()
You can have an over view of where to begin your data cleaning from

With filename.isna().sum()
You can hnow how many spaces in your table does not have values and you begin your cleaning
Either by using .dropna or fillinh the column or row with the mean of the valuses available.