I can't speak for any of those toys.
I'm a virgin as well and pretty new to this stuff myself. My first toy was a Hitachi Magic Wand. It was scary at first, but I just took a bunch of towels and layered it over the area until I got used to the vibrations. Then I'd flip off towel layers. I started with just clit play and exploring. Later I bought a bunch of attachments, including a rabbit one that is small and smooth.
The key with getting ready for penetration is lots of foreplay - buildup and exploring around. If it's not lubed up enough down there or uncomfortable, keep playing around with other bits until it is. You might need some artificial lube to really keep things safe and comfy. But don't use too much, either...
Rabbits still confuse me a little. I prefer to focus on one area at a time right now - G spot or clit, not both at once - so I can learn about the different feelings and how each orgasm feels (they're a little different).
Good luck!