Learn English – “Where are you now at?” — grammatically correct

The “to” in “Where are you going to?” sounds superfluous to me just because “Where are you going?” is perfectly fine and I cannot think of any reason to add “to” to it.

The reason why “Where are you going to?” sounds strange is not because the sentence ends with a preposition. For example, there is nothing wrong with the sentence “Who are you talking to?”

The sentence you write should have a different order of words. It should be:

I have already drawn two stamps.

You can use this structure to say that you have completed something, i.e. drawing two stamps. It can imply that your activity of drawing may continue, but its primary use is that of showing completion of an action in the past with results that are visible in the present.