I have shared in a post about how I faced the fear of Traveling by doing a solo Rome trip:
https://everydaysinspiration.com/how-i-faced-my-fear-of-traveling-alone-and-experienced-the-best-time-of-my-life/
Here are some more tips in this website you may need while you travel to Prague
https://theculturetrip.com/europe/czech-republic/articles/11-incredible-things-you-never-knew-about-prague/