Do you think 4 days is too long for a first time solo trip?

having travelled extensively by myself I would say that it could be both too long and too short. let me explain. my first trip alone was 3 months across Mexico. I remember the emotional vertigo of completely stepping out of my comfort zone and having to get used to it. also, after days and weeks of travelling I started to really need human company so it became natural to just talk with everyone, and to this day I am still like that. now the problem with a 4 day trip is that it might not be enough to force you out of your bubble and talk with strangers and the result would then be 4 days of being alone which is a lot. so, if you do it, don't stay in your bubble, talk to people.