If you like to be alone, then, of course, do it.
Because I'm not that kind of person, I'm bored to travel alone. I need a person around me to communicate, share emotions, feel supported.
But I have a friend who has already been to 7 countries and she went there alone. She says that she likes this way of traveling more, because she chooses the routes she likes, does what she wants, and does not have to take into account the wishes of another person.
I think the main thing is to choose a safe route so as not to get into trouble when you are alone.