[Excalidraw] Making custom shapes made out of multiple line into one object

What I’m trying to do

Draw a custom shape using multiple objects, and convert it to one object so I can fill it with colour.

Example
This,

into this

Things I have tried

Using the Concatenate lines script I can join 2 objects at a time to turn it into one then add background colour.

Process

  1. Draw shape
    image

  2. Select 2 lines
    image

  3. Use script

  4. Repeat it two lines at a time

Is there a better way?

Maybe using free online vector graphics? E.g. flaticon?

That is the easier option, but I wanted to know if there’s a way to do it with excalidraw that I’m missing.