The best way to study for the CCNA is with an official Cisco’s course delivered by a Certified Cisco’s Trainer.
the Corse should prepares you both for the facts of the exam as well as the practical knowledge of configuration.
Also the chosen Center should gives you the possibility to do Labs on real Cisco materials or approvals simulations ( GNS3 or Packet Tracer).
In CERTIFs IT you have the GUARANTEE to benefit to all of these elements and make your learning journey most pleasant as possible