On the last day we tried still water wings, which we had also bought at a pinch - so that the child is much deeper in the water, is a little more flexible on the way logical way but just not as safe and stable.
So for the first contact with the deep water I can only recommend this swim coach! As a swimming coach to use per se - you can - but I think, because the movement of the arms is still somewhat limited, so you can get quite heavy Schimmen. With the armbands which is much easier because the arms are exposed. The swim coach has the advantage that the child is already held in floating position by the corset.
I'd like to spend your first give the child the swimming coach and after settling the mold wing. Makes about 20 euros together - I think that's okay!