I’m starting to not like my chosen name anymore?

I'm starting to not like my chosen name anymore. I originally chose the name Janice because it's simply a name that spoke to me, but to me, it also it sounds like a "tough girl" name while having some elegance to it at the same time. I’ve used this name for about a year now but I’m starting to lose interest in it. I just don't feel like it suits me anymore. I've thought about other names. On one hand, I would really like to honor my heritage (Irish and German) with names local to it such as Keira or Heidi. However, I've also had a fascination with the name Monica. For some reason, this name is super unique to me and while it's relatively common, I still love how it sounds and the meaning behind it. I've also thought about similar names such as Veronica or Victoria. I've also thought about changing the spelling or variation of my current name such as Janis or Janet or even just simply Jan. I've thought of countless more names as well, but I just don't know what to do with my name. I'm also afraid of being an annoyance to my friends and everyone I know at school (I’m in college and my parents don’t know I go by a different name). Everyone including my professors call me Janice and they have been for as long as I came up with the name. What should I do about my name? What are some tips on deciding a new name or if I should just keep my current one? If I do decide to change my name, how should I tell my friends I'd rather be called my new name without being a burden or annoyance?