Navigation inside a field on iPad.
I understand one can touch and hold to bring up the magnifying glass, then drag to position the insertion point in a field. I find it is very awkward in doing that. First of all my finger is blocking my sight. Next the movement is very delicate and sensitive, often stops at the wrong place. Thirdly, where there are lots of characters it takes ages to get to where one wants, especially when one wants to get to the very beginning or to the end of the field.
Any easy way to go about it? Is there some home key and end key, left-arrow key and right-arrow key?
How to select only certain sequence of characters instead of the whole lot? It seems to me it only allow to select all or in case of URL field in Safari some section predefined by iPad or Safari.