The smaller native breeds are not usually put into lamb until their second autumn, so they are exactly 2 years old when they first lamb. For your first sheep, my feeling is that you would be better to get a mix of lambs, and a couple of older ewes, maybe 4 yo, in lamb. That way your first lambing is of experienced ewes and meanwhile you become familiar with your lambs, and they with you and your ground. They will have seen the older ewes lambing which always helps when their own lambs pop out, so they know what to do, not just by instinct.
So I would wait for the other two breeders to get back to you and see if they can offer you a couple of in-lamb ewes plus some unbred ewe lambs (hoggs) born last spring. We all felt the need to get going with keeping animals when we first moved to our smallholdings, but it's far better to wait for the flock you really want, and not unwittingly buy in a problem because you can't wait. A day or two here or there will soon be forgotten, but buying animals which later give you grief could be a longterm problem.