(There is not much to correct here.)

My work

Today has been a very productive day. I have learned a number of new statistical tools and implemented some of the methods using various open source software packages which I have had installed on my desktop machine last week. Overall, I am excited about my results and work progress.  and My senior is also satisfied with my progress and day to day work routine.

(You could say "PC" in place of "desktop" depending on what machine you're talking about.)