Kickstarting my interview prep

Hi folks As a new year resolution, I want to be interview ready at the start of this year ( say by Feb end). As far as my professional experience goes, I have worked on .NET/ C# for the last 3 years. It's been a while since I have done leetcode/DSA so I'll be starting from scratch. My doubt is do I choose Java as a language for coding, where my knowledge is rudimentary at best and I'll need some ramp up time. Or is it okay to go with C#, which I am already good at since I work on it daily. Will choosing C# hamper me in coding rounds or interviews or resume shortlisting ? How important is this choice ? Personally I am inclined towards c#, as that will allow me to start coding right away without syntactic hassle, but I would really appreciate if experienced folks here can give their 2 cents. I don't want to spend too much time dwelling on this and break the momentum at the start itself I am of course open to learning new frameworks /languages if required in the new job. No such restrictions as such.