The camera you are talking about is an Alpa, not an Alpha. They are all rather quirky. If you want the experience of an odd old fllm camera you might try it. If you just want to take pictures, get a Nikkormat.
They're a superb camera, if you can get past the quirks.
The Kern lenses the Alpa uses are to Leica lenses as Leica lenses are to Nikon lenses. - you won't find better at any price.