You’ve already got one response to this which is correct. I want to add to it to help explain how FPTP voting systems result in a 2 party system and simply voting for another party does not solve the issue.
But first you’re either aware of the problem and want to encourage people to vote third party while pretending not to know how the system works or you’re actually just ignorant to the issue.
I don’t normally like video links in discussions like this but this one is especially good and is only 6.5 mins.