How to study for Cisco CCNA R&S

Hi Rene / Team

Would u please suggest and guide us about the evolving tool come in networking market for practicing the troubleshooting or virtual scenerio
Like as I heard about cisco virl , dcloud , eveng , gns 3 .

Kindly suggest it’s initial installation ,how to inbuild or upload ios images on all the tool as in documentaion it’s really quite tough .

Would u please help in sharing the easy demonstration steps one by one and suggest how to make a good practicing in switching like layer 2 and layer 3 switch as I m quite weak in practical .

Request you to please suggest personally in this .

Regards
Shivam Chaudhary