Terminating condition in Bubble sort is "did we swap any values during this loop"? Yes -> continue, No -> list is already sorted, exit the loop.

I don't believe that insertion/selection sort is easier to grasp. Can you type it from memory, without looking it up? Here's bubble sort:

    var swapped = true
    while swapped:
      swapped = false
      for i in 0 .. list.len-2:
        if list[i] > list[i+1]:
          swap(list[i], list[i+1])
          swapped = true

  for i in 1 .. list.len - 1:
    j = i - 1
    while j >= 0 and list[j] > list[j + 1]:
      swap(list[j], list[j + 1])
      j = j - 1