It’s normal to feel anxious right before travelling to a foreign country, particularly on your own and perhaps for the first time. I felt that way when I first ventured abroad to study in London a few decades ago. As others have mentioned, initial anxieties often fade quickly, as you make new friends, become familiar with your surroundings, get into a routine with classes, etc. And remember that if others are able to do it, many of whom might have shared your anxieties, chances are good that you can as well.
Compared to when I first ventured abroad, you can now instantly connect with families and friends back home via FaceTime/WhatsApp when you’re homesick. I, too, felt homesick but back then, we could only write letters, as international long-distance phone calls were quite expensive, and you didn’t hear back for a few weeks.
Not to set the bar too high, but my London experience was truly eye-opening and life changing - met my wife that year as well as a few life-long friends who now live in different parts of the world.
Watching travel videos is a great way to get excited about venturing abroad.
I’d go with “Deep down, I think I do want to go…” and have faith that it will work out well. Best wishes!