You discover a new person inside yourself when planning a solo trip, one that can make a choice, and is not afraid of starting a new path that can lead something wonderful, different, and eye opening.
When you are planning your first solo trip and then take it, you open yourself up to connections with strangers more so than traveling with a group. Planning a solo trip and going through with it is the same if you show up to an event somewhere in your local town.
So if you have been thinking about planning a solo trip for years, but have been scared to make that first step, just take a deep breath and do it! Looking back, you will only ever regret the opportunities you did not take along your journey.