Just starting to learn Japanese, but it looks something like:
watashi wa <"hon" kanji that might be pronounced differently><some kanji I don't recognize>ni baka desu

If I had to hazard a guess, it's "watashi wa hontou ni baka desu" which translates to something like "I'm honestly an idiot," which is often used like the phrase "I'm such an idiot."

TL;DR: "I'm such an idiot."

fox_the_apprentice said:

Just starting to learn Japanese, but it looks something like:
watashi wa <"hon" kanji that might be pronounced differently><some kanji I don't recognize>ni baka desu

If I had to hazard a guess, it's "watashi wa hontou ni baka desu" which translates to something like "I'm honestly an idiot," which is often used like the phrase "I'm such an idiot."

TL;DR: "I'm such an idiot."

You are correct, that does say "Watashi wa hontou ni baka desu"