Make Graphs With Large Data Sets In Excel?

Hello data experts! I recently graduated as an analytical chemistry and started working for a system integrating company as an R&D specialist. I test and validate instrumentation, and develop applications for specific analyses among other activities.
In my latest project I collect data every ten seconds 24/7 from multiple inputs which at the end of the week leaves me with hundreds of thousands of data point. Graphing these data sets with Excel has become almost impossible even after reducing the number of points. What programs/procedures would you recommend to make these graphs and analyse trends without the program crashing on me every time I change anything? I haven’t used anything else other than Excel up to this point and my experience with programming is non existent. Definitely willing to explore options if it means fast and efficient data analysis. Help is much appreciated, A starting data analyst