How do I graph error bars

Guys pls help, I’m so done with excel. I have a bio assignment where I have to graph 95% CI and I need to include error bars. I have created the graph, removed the trendlines but I can’t find error bars, I’ve watched so many videos but I’m on the web version. I have clicked on the graph, then instead of ‘chart tools’ mine only has chart and I can’t find chart elements or anything to add the error bars. Pls help me