After having a fixed wing PPL for 27 years, I went and got my rotorwing PPL. I chose the Sw 300, as I had flown an R22, and we did not like each other. If you can afford it, and find one, an EC 120 is also a delight to fly. I have never flown an R44, though people I trust say very good things about them.
Interestingly, shortly after earning my PPL on the Sw 300, I had occasion to fly an MD 500. After a half an hour, the other pilot asked how many hours I had in 500's. I told him "half an hour". He commented that I flew it very well. I told him it was 'cause it flew the same as the 300, other than learning the engine (which I knew from fixed wing flying). After a few more hours in the 500, and some amazing back country flying, he type endorsed me in the 500.
Jet Rangers are also a delight to fly, but require a lot of practice to fly really well....
AS 350's require a lot of practice to fly really well....
Go for it, you'll be very happy that you did!