Hey guys! So my friend gave me her hog island boa a couple weeks ago cause she was moving and couldn't keep her. I'm not sure how old the snake is but she is fully grown and is eating just fine. However, I got her about two weeks ago and she CONSTANTLY hisses at me. She won't let me pick her up because she will hiss and retract her head as if she's about to bite and I don't want to make her uncomfortable. I talked to her previous owner and she said that the snake would hiss sometimes but not all that often, so I'm a little worried. This is also my first boa so I want to make sure I don't do anything that will upset her. Other boa owners: how long does it usually take a snake to adjust to its surroundings? Is this behavior normal? I'm really worried that I got stuck with a snake that I can't even interact with.

Thanks!