Instead of an L-shaped desk which may work very well for you now but not in the future.
Buy 2 tables and put wheels on them that are lockable. Then buy some drawers and put them on castors to go under your tables. Ikea has some great choices for that.
This is how I have done my sewing room and I couldn't be happier. If we move I can put them in another configuration. When I need more space to cut material and baste I move the tables together.
Cleaning is also easy as I can move things around easily.