Fear about having the mark of the beast

I feel very embarrassed about talking about it.

I've been interesed in orthodox christianity since the month of march. i get very overwhelmed with the amount of knowledge i have to learn and this while juggling with my poor mental heatlh.

I heard a lot of people saying that those who had gotten the covid vaccine have no chance to being in communion with God.

What should i do ?

I took it last year and i'm very distressed right now, even if i know some people will think it's just some conspiracy.