How to organize a gigabit network from an existing one?

Question

Computer networks

Available

• Mikrotik RB2011UiAS-RM
  
• Existing enterprise network (100 Mbps)
  
• PC with gigabit network card
  

Description of the situation
RJ-45 sockets are installed in the cabinets, connected to a patch panel in another cabinet by the type of direct crimping (all cores are used - 4 pairs). There was a need to organize a gigabit network.
Questions

1. Is it possible to switch to a gigabit network?
   
2. Is it necessary to change the crimp of the wire between the patch panel and the socket to a crossover one or will it be enough to connect a PC from the socket via a crossover cable?
   
3. Which wire to connect the patch panel with Mikrotik and the socket with the PC: direct crimp or cross
   

It so happened that there was a need to get acquainted with gigabit networks.

Answer 1

It so happened that there was a need to get acquainted with gigabit networks.
And also familiarity with the Russian language would not hurt.
Maybe
not necessary
Welcome to 2020, for 20 years now, all devices have been able to auto-detect crimping. connect with standard crimp 568B

Answer 2

It makes no sense to overcompress and cross anything, as long as your rb2011 can handle

Answer 3

I hope you understand that in Mikrotik you only have 5 gigabit ports? There is definitely no switch between the patch panel and Mikrotik?