For the top, I think I would try making rounds of smaller shells, going down to 6 dc, then then etc
Shawl & Charm & crochet → ok this pin leads to another crochet board.
Posts on the topic of Вязание added by ludmila oldenburger
Interesting take on Aran
ru Tutorial for Crochet, Knitting.
МК Спицы "Пришивная" планка [ "This is in Russian but the photos are good. Attaching a knit placket", "Find and save knitting and crochet schemas, simple recipes, and other ideas collected with love.", " (Ideas from the Internet) / Crochet / Women