I think a good natural progression from excel is:
RAW - http://rawgraphs.io/ and then Tableau Public - https://public.tableau.com/s/ (unless you're a student, then you can get tableau desktop for free, which let's you save local files too)
Those would be two tools that provide graphing capacity beyond what excel can do but still within a relatively user-friendly interface. So now you can take your excel data and plug them into those two :)