An asymmetric hammock has the best laying position. Tarps can be had fairly cheaply on Amazon, we’ve had good luck with the Chill Gorilla brand on Michelle’s set up and saved a significant amount over buying a higher end tarp. There are a bunch of brands to chose from as well. My Warbonnet tarp packs smaller and easier though and is lighter.
I’d buy a good quality hammock and pair it with a more basic tarp, underquilt or pad. If you like the hammock you can upgrade the accessories as you go along. Buying a hammock that you can’t get comfortable in, as in the banana position, will have you writing off hammocks right from the get go as well as not having insulation even on a warm night.