I just downloaded QGIS 3.10 Mac version the other day and I am still very green with the program. I was wondering what is the best way to obtain high resolution satellite imagery? I know there are some websites you can pay for it, but I was wondering if there are any ways you can get it for free?
It depends a lot on where you are trying to get data for. If you're in the US then check out The National Map - there's tons of data for all over the US listed there.
Otherwise you can look for QGIS plugins that will load basemaps and base-imagery into your QGIS project. As described in this question.
If you're outside the US, or your area of interest is, there could very well be other sources similar to this that can help you out but I am not familiar with them.