[member="Darth Venefica"], happy to answer your questions that pertain both to my Alt of Dak and myself.
Firstly, starfighters in Kashyyyk, say whaaat? Totally hit by branches, right? Wrong. Several reasons.
1. The beach has no branches. The beach is devoid of a treeline. The beach is specifically where both Talon and Ryan Korr flew their star fighters and bombed the approaching Sith. Then they bailed out of their craft before reaching the treeline.
2. Wait, so how did you fall so far and survive? Canon is full of numerous instances of Jedi using the Force to leap great distances and slow their descent. I personally used the momentum provided by ejecting from the star fighter and transitioned that into a downward descent onto the top of Kachirho, from where Ryan traveled to get to Corvus. So we landed here by flying here and dropping through lots of branches. I will have it noted that we suffered damage in falling and, unlike other Sith forces transitioning from B to A or C to A, we did not bring any NPCs. That makes it a lot more feasible.
Now, as for your last problem. What in the world does Kachirho look like? Here are several pictures.
On the outside it is rimmed with rope bridges and platforms:
And on the inside it looks like this:
Hope that satisfactorily answered all your questions.