I went to art school, used the medium. Its pronunciation is similar to the word “squash” except with a “goo” or “gwa” sound at the beginning. Sort of like “gooawsh” or “gwash”.

OP, good work, gouache is one of the more difficult mediums out there as essentially it’s opaque watercolor. Gouache is a very unforgiving medium, as it’s very easy to end up with a washed out mess the more you try to fix mistakes.

But there’s a reason old masters used gouache as it refined their technique and forced them to think carefully. They generally used it to sketch and prepare studies for an oil painting.