What are your Thoughts on Replying and Hearting Comments?

So my first ever video that has more than 0 to 1 comment(s)... basically...

And this video has over 50 comments. What is your thoughts on replying and hearting?

I have been replying to most and hearting most. But then the ones I don't heart stand out... maybe it makes it seem like I really disagree with them or something. Sometimes people even write a sort of sad comment, but it's supportive and in line with the video, and it seems weird to "like" or "heart" that.

And then I also think, do you think it could intimidate some people? Like for me, when I just view YouTube, and leave a comment, I don't expect the Channel's author to reply. Maybe because I watch videos that have a 1000+ comments or something, but do you think that could discourage people from commenting? Like they just want to leave a comment, but not actually get a reply?

And then I overthink how to phrase some replies, and maybe they liked my video but then didn't like my comment...

I know I'm probably overthinking? Haha. But this is new to me and I'm wondering how others approach it? Thanks!