Choose a chart for the question you need to answer. Columns compare categories; bars make long category names easier to read. A line chart shows change across an ordered sequence such as weeks. A pie chart shows parts of one whole, so its source should contain one numeric series and categories that belong together.
Select the source table, then choose Insert > Chart. The chart editor has two tabs. Setup controls the chart type, data range, x-axis, and series. Customize controls titles, legend placement, colors, and other appearance settings. Row 1 can supply headings instead of becoming another data point.
A combo chart mixes series types, such as attendance columns with a capacity line. Both use counts here, so a shared axis makes sense. Don't add a second axis just to make two unrelated lines appear to track each other.