I'm about to pick up a brazilian rainbow boa, a mexican and sinaloan milksnake

I had a look at a royal python but decided against, let us know which one you decide on!

brazilians are nice snakes i have four!!
just not great starter snakes

This will be my first snake, luckily the place I am getting her from is very good and offer a lifetime of support and help should I need it, they've given me a couple of books for free too and some pointers so fingers crossed it should all go okay. I've already seen her feed and was handling her today, roll on friday when I pick her up!

just be careful as to regards their humidity needs , they can dehydrate very , very fast!

I have read that about them which is why I've decided to use Orchid bark for substrate and I'm using a glass fish tank actually lol for her housing (making sure the lid is tightly secured!!) I believe that should help with the humidity, oh and a bowl of water which has a large surface area. Does this sound okay?

mine have always had their own viv`s from an early age inside those i use large RUB`s filled with live moss [this is really useful in helping them to shed] plus they love it , as for substrate i use crumbled coir for my own and eco earth , i mist them all around 4-5 times a day to keep humidity levels high and they thrive with that , just keep check on that and don`t let it go below 50% humidity tho even 50% is risking it.
also they do like to climb so provide some nice decor and jungle vines , reptile safe wooden branches , don`t be tempted to pick any up walking the dogs or anything as these have to be scrubbed down then frozen for several months to make them safe and don`t bother with live plants because they trash them
and be careful if using a heat mat with a brazilian boa in a glass tank , it can inflict burns!