There are so many great beginner herps. You can decide what environment you want to maintain and build, and let that dictate what herps you want to look into.
Rainforest terrarium: anoles, grass lizards, etc are a great choice for beginners.
Rainforest vivarium: green tree frog, whites tree frog, red spotted newts, fire bellied toad, FB newt, paddle tail newt,
Desert: maybe a leopard gecko (maybe a larger footprint would be better)
Good luck and feel free to bounce questions back and forth once you get your species picked out!