Nahhhh don’t worry about how you would sound writing in a journal. I keep mine hidden and don’t tell anyone around me about it. I do it in private and i write once every 2-3 days. Just updating what I’ve been up to, what I’m feeling, dreams or nightmares I’ve had (if i remember them) I don’t like to burden my partner or friends with negative thoughts I’ve had since I don’t want them to worry.

Lots of people journal. You can also do it in your notes app, you can just voice record it. Making a habit of it makes it easier