"This morning's drawing practice" should be more natural if you say "오늘 아침 그림 연습."
"Equilateral triangle in a circle" should be more natural if you say "원 안의 삼각형."
"It took a lot of patience to arrive at an image I was happy with" should be more natural if you say "내가 만족스러운 그림을 찾기까지 많은인내가 필요했어요."
"A simple form with exquisite images hiding inside" -> This is a bit tricky because it depends on how you wanted to use exquisite. I assume "단순한 모양 속에 숨은 아름다운 이미지"
"This morning's drink is mate with honey" should be more natural if you say "오늘 아침 꿀을 탄 마테차 한 잔" (Translated liberally though)

Cheers!~