I need two creative illustrations for my website plus its logo improvement

I need two illustrations for my website, or actually improvements for them. I have already sketches but I feel they need to be corrected.They need to be more engaging for the potential visitor. The style needs to be simple with a direct message for the viewers. Those drawings need to look like drawn on the blackboard (white, grays...), because the whole website is kept in this style. The illustrator whose style I love and seems to be perfect (except colors) is Christian Ward. I will appreciate your responses.

Karolina