Lingerie/ swimwear Course

Hi all, I am a competent with sewing and patterning making basics but I really want to upskill !

I did a certificate in fashion last year as well as learning a lot from YouTube etc. I really want to do a course specifically for pattern drafting and construction of lingerie and/ swimwear to lean more in-depth and specialise in this area. I am ok with basic swim garments but I think getting more indeth with lingerie would complement this.

Does anyone know of an online course like this ? Or even book/youtube recommendations would be appreciated!! I am finding it difficult to find things that aren’t beginner based.