Can a Human Disguise Self into a Grung?

I want to pretend I’m the grung goddess Nangnang, and I thought of using Disguise Self to make that illusion. My party will support me with Daylight, Minor Illusion, yelling Grung phrases into a horn that amplifies and distorts them, Fog Cloud and a Griffon for a stylish landing, and an invisible Imp touching the Grung King as I pretend to touch him from a distance (to avoid physical inspection).

Disguise Self states that

You make yourself look different until the spell ends. You can seem 1 foot shorter or taller and can appear thin, fat, or in between. You can’t change your body type, so you must adopt a form that has the same basic arrangement of limbs. Otherwise, the extent of the illusion is up to you.

Now, Grungs are fairly different from regular humans, but they are still humanoid, have similar limbs, etc. I would become a very big Grung, but that is to be expected, I’m a damn Goddess! Is this plan feasible?

Is it feasibile to play a Grung character in Descent into Avernus?

The Grung race has the Water Dependency aspect that requires they spend an hour each day immersed in water.

I don’t know much about the Avernus campaign but I get the sense there may not be much water in hell.

Could a I reasonably play a Grung character without some sort of homebrew allowance for the Water Dependency or would a Grung character shrivel up and die of exhaustion pretty quickly?

Can a grung druid use their Poisonous Skin trait during Wild Shape?

The Grung player race (from the One Grung Above supplement, released to raise funds for Extra Life) has the Poisonous Skin trait:

Any creature that grapples you or otherwise comes into direct contact with your skin must succeed on a DC 12 Constitution saving throw or become poisoned for 1 minute. A poisoned creature no longer in direct contact with you can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.

You can also apply this poison to any piercing weapon as part of an attack with that weapon, though when you hit the poison reacts differently. The target must succeed on a DC 12 Constitution saving throw or take 2d4 poison damage.

My questions:

  1. If I (as a druid) Wild Shape into any creature with skin, is that enough to make me “physically capable” of using the Poisonous Skin feature?
  2. If I Wild Shape, do my natural piercing weapons (such as Bite) qualify as weapons for the purpose of applying the poison to an attack?

A RAW answer is strongly preferred.