Gave access to active network equipment. What's next?

Question

Cisco

Greetings!
I read literature on preparing for CCNA and in general on networks and the TCP / IP stack. At work, they gave access to the active. Those. to climb there via ssh and "touch".
But the question is this. What should I do now with this "live" structure in order to benefit, to gain knowledge and practice skills?
Work with unused ports: raise vlan, turn it on and off, etc. (I'm simplifying the description of course)?

Answer 1

Do what is written in your CCNA prep literature.

Answer 2

CCNA is a naked theory. Enough for the preparation of CPT or Unetlab.