well it is not that simple. YOU DO NEED some academic, hands on knowledge and reading tutorials, books and watching videos wont get you that far. Right now Im getting my BA in computer engineering and networking. I have taken 4 courses about networking and Im still missing 2 just to get my degree. Packet tracer is like really basic, eNSP is like the low-middle ground of networking. The good stuff begins with virtual machines,voip and networks. The real deal is working in a data center or network center with actual routers, switches, AP and so on.
Since you say that you dont have access to actual cisco routers , set up a virtual box with several pcs, switches and routers. Practice many network configurations and learn as much as you possibly can, especially the commands.