I did see this but unfortunately I don't have $1,100.93au to get a new graphics card but a friend did give me his rtx 2060 because he got a new oneWelcome to the forums, newcomer!
You could look for a higher pedigree discrete GPU like this one. Perhaps look into this thread as well as this thread. As for your question on an external GPU, you don't have the option for an external GPU dock since you lack any Thunderbolt ports. You might be able to get a breakaway cable from the WiFi slot but you loose out on internal WiFi.