Yep. This was how I learned to play. We played at tables or while walking around as needed, and for times we needed random numbers we had a little piece of paper with a big grid with numbers and we'd flick a pencil at it and wherever the eraser landed was the roll. Everything was d20 and we had very little idea of the rules, and over time as we got sourcebooks we started to absorb them gradually, but mostly we used the sourcebooks as a repository of lore as opposed to as anything prescriptive in terms of the mechanics we should be using.
10/10
You have to make sure you don't have any power-hungry dickbags in your group that will abuse it I guess, but we had an absolute blast in every sense.