HOW TO TRADE FOR POE2 ???

I wanna use the market website but its doesnt work at all i dont know where to go to check and i already have the poe2 install cant figure out to go for poe2 section because they asking me to buy the game WHEN i have already the game rolf anyone can help me to figure out how work the trade section if need get in discord for stream to explain it or idk need help plzzz.