The first language I learned is C# and it sparked that interest that got me the job I’m in now!
I see other people recommending Python for beginners because of the simpler syntax (the way you write the code) but I’d still recommend C# because although the learning curve is a little steeper you’ll find it MUCH easier to learn pretty much any other language you choose. And even if you don’t choose to learn another language, you’ll still know a good (and fast) general-purpose language!