I was going to suggest a moby but that could be hot. It is the easiest thing with infants though. I also used my ring sling a lot when she was teeny, in tummy-to-tummy. It is pretty simple, and not hot depending on the fabric. I have a single linen sakura bloom and love it.
I was going to suggest a moby, but it does get pretty hot after awhile. I now have a Vat and would use that in the same hold as the moby suggests if I had a tiny one again. GL.
Ring sling!! I looooooove mine from Sleeing Baby Productions. Love love love. I have a Mei tei on the way to me- a Freehand, and am excited to try it out. Next carrier I get will be a linen wrap. Moby is great for inside and winter babies, but I find it too hot for outside use in summer. But I do like my Moby too.
Re: Wrap/sling/carrier recs for small, snuggly infant?
Not complicated? Maybe a mei tai or a ring sling. Sometimes people feel frustrated by the learning curve that comes with a wrap:
Sling Guide
Choosing a Baby Carrier
Mommy to Rachel 1.15.06 and Ashley 5.17.11