Is this your first sketch? Hang onto it, there are occasional threads where we show our first sketch. They are somethign to be proud of, especially as you sketch more. You may not know you've started a journey, but you have taken the first step.
I used to think of sketching as a poor man's imaging, but it is so much more than that. It's an art form for some, and a record of observations for all of us. I'm my opinion, there is no better way to observe and learn to observe than to sketch what you see. That's the journey you are on, a journey of discovering what you can see and learning to see more.
And this is, in my view, the best forum for sketching. Be sure to check other member websites for their sketches, too. So, with that, welcome to sketching and the CN forum. You did a nice job, the trick is to keep them coming.