Have you tried watching any videos that explain how to play or talking to anyone in your squad when you play online? It’s a game meant to be played as co-op, not really solo.
Assuming you aren’t trolling… If you want to try again, how to play with others is really simple. In the world map, you can press “R” to quick play and it will put you in a mission with a couple people in it. You can also throw a SOS during the mission (idk if it works if you set matchmaking to friends only in settings, try making it public).