Rule of thumb: know your audience before you share. Recognize what they will accept and what they will reject. It took some time for me to learn, but I feel like I found the right balance. The trick is not to dump everything we learn. The trick is to lead them into seeing what you see.
Like with children, start with the little stuff. Point to facts, to government documents and confirmed stuff that is from sources they won't reject. Then just… keep sharing more and more.
I have managed to successfully make a staunch provaxxer early on to start questioning everything and regret taking the vaccine. All by just sharing scientific papers, articles about covid from mainstream media that contradict themselves, the fuckery and constant moving of goalposts. The heavy stuff will come when the stage is set, and it's just about to be. Have faith, use discernment and, again, know your audience.