Resources for Grouped Graphs
Weissgerber et al. 2019 paper from the journal Circulation (and the references cited within it) is a good overview of why it is recommended that you DO NOT use bar graphs for data with continuous dependent variables grouped by a categorical independent variable. This paper focuses on visualization problems in peripheral vascular disease journals, but the conclusions are widely applicable.
This is a recording of a webinar talk given by Tracey Weissgerber that included many of the same concepts as the 2019 paper above.