Dear aspirant, CS Geeks (https://www.youtube.com/channel/UCFpCo01pOGe4tEbOTnn4_UQ)

is better for the MS.office, Excel and any topic related to computer.  There are many Youtube channels like Sali Kaseli, Best Tutorial etc. from where you can learn MS.office, Excel and many other. Moreover Microsoft also provides youtube tutorial videos which are also very helpful but one disadvantage that it is in a little higher standard which is not appropriate for the beginners. So, among all the youtube channels, i would recommend CS Geeks, the best. You can also go to their website Geeks for geeks (https://www.geeksforgeeks.org/).

Good Luck.

Thank you.