A warm welcome to the Forum!
Yes I agree with Maureen, it does look more like a drawing than a sketch, and is a very nice drawing. A sketch usually has a sketchy look about it and is rendered fairly quickly, whereas a drawing can take heaps of time to complete and there's always more detail in a drawing.
If you are intending to keep drawing in graphite, you need to make a tonal scale with a B pencil going from a very light tone to the darkest tone you can make. It will help immensely in getting a good range of tonal values.
Have you given any thought to entering our Plant Parade Monthly Challenge?
There's always a new plant Theme and a different Host every month, so lots of variety. You can draw/paint using any art medium and to draw something for the Challenge would be excellent practice for you....and lots of fun too!
The Plant Parades can be found as a Sticky at the top of our Forum Page and "Reveal Day" is not until the 25th of the month, so still lots of time to enter if you are interested. Check out last month's Plant Parade to see how it works.