There are a series of basic steps you need to be familiar with when using QGIS:

• Loading Data into QGIS
• Filtering and subsetting Data
• Using simple analysis tools to spatially subset (Clip) data
• Save data for later use
• Styling/symbolising Data
• How to create a Map.

If you haven’t got QGIS I recommend you can follow this guide to installing QGIS.