I've probably given this more thought than I should have but have come to the conclusion that us trying to contact them is irrelevant.
The map on voyager would be useless for finding Earth (more about that here www.google.com/amp/s/www.forbes.com/sites/startswithabang/2017/08/17/voyagers-cosmic-map-of-earths-location-is-hopelessly-wrong/amp/). Plus despite it being launched decades ago it's only just left our solar system (not even a light year away) and will take another 44,000,000 years to reach our nearest neighbouring galaxy. Our radio waves don't fair much better, with the earliest signal only traveling 200 light years from earth. Again for reference our nearest galactic neighbour andromeda is 2.5 million light years away. So that more or less rules out our attempts at communication reaching anything resembling alien life before we manage to destroy ourselves.
That means for alien contact to happen you're relying on space fairing beings find us and that in itself is very unlike. If alien's could travel at, or near, light speed it will still take them millions, or billions of years to travel the galaxy. Even if they've mastered faster than light travel they'd still have to know where to find us and that would be akin to trying to find a single, specific grain of sand from anywhere in the world.
We also know that the images we see of other planets/stars are of how they were when light left them. Again using andromada as our base, an advanced alien race looking at Earth from andromada would be seeing earth as it was roughly 2.5 million years ago. It won't be till around 2,490,000 a.d. before they'd see more advanced human life.
Of course there's the possibility that they've already been here but if they arrived thousands or millions of years in the past and didn't destroy/conquer/integrate/harvest us (or the dinosaurs) then they're unlikely to come back anytime soon.
Finally it may be that whatever form of alien life out there is so far beyond our understanding that we simply can't comprehend them. We may be like an ant colony in the middle of a rainforest, busy getting in with our lives, completely oblivious to the advanced beings around us.