Congratulations!!! I have a three month old and I already had a Baby Bjorn, but he was too little for it for a while. I wanted something easier to put on, that I could wear around, and go in the pool with . I found it! It's called a solortech vail(I think). It's has a high SPF, is adjustable with a tail for nursing or keeping legs or head out of the sun, can be used from newborn-something like 40 lbs., and waterproof!! Although a lot of companies have these, I got mine from Taylor Made slings for about $50. The first couple of days I LOVED-HANDS FREEEEEE! Now I don't really like him in front of me, but it does the job. I recommend it.
Good luck! Let me know if you have questions.