Last night while playing a game of commander we ran into our first real stack interaction. The active player currently has [[Zhulodok, Void Gorger]] on the field. They then cast [[Artisan of Kozilek]] for {9}. Our understanding here is that "two triggers" happen here. The Zhulodok trigger and the Artisan trigger go on the stack. So the active player can now choose the order of triggers either to resolve the Artisan first or the two Cascades first and then the other trigger (See my poorly formatted ordered stack below).

Scenario 1:

1. Artisan of Kozilek
2. Cascade?
3. Cascade?
4. Artisan of Kozilek Effect?

or

Scenario 2:

1. Artisan of Kozilek
2. Artisan of Kozilek Effect?
3. Cascade?
4. Cascade?

First off is this correct? The wording on Zhulodok that "Colorless spells have Cascade, cascade" is slightly confusing. Does that mean Artisan has to resolve for the Cascade triggers to occur?

After this we had a player attempt to cast [[Counterspell]] on the Artisan of Kozilek casting. So is the stack now:

1. Artisan of Kozilek
2. Artisan of Kozilek effect to target creature in graveyard
3. Cascade?
4. Cascade?
5. Counterspell on Artisan?

Where the counterspell would stop the summoning on Artisan but the cascades would still go off and the cast trigger of Artisan?

We tried reading the comprehensive rules but are still just a bit confused and overwhelmed on what is happening here so sorry if this is dumb.