Spoiler: In the meantime, I even think that the universe is very big, but rather not infinitely big. Why I think that, you will find out in the coming parts.
while I was reading that was what came to my mind, I don't think it's "infinite"
It is gigantic but not infinite, however, if we take into account that it is in constant expansion, then is it infinite? or is it not?
Good question, the expansion alone doesn't make the universe infinite, but I will come to that question in an upcoming blog post.