Since you mentioned you are already a seamstress, chances are you dont NEED anything at all. But i think most of us fi d the rotary cutter, ruler and mat to be far preferable to cutting pieces with scissors. Its useful to have a space to lay out your design- either flat or on a wall (i have pinned blocks to curtains, but that is not ideal!) Seach 'design wall' for ideas. A camera is good for seeing better when you trial different combos but, again, not necessary.