I self-studied for my CCNA R + S, CCNA Security and CCNP Security component exams using a combination of CBT Nuggets video training (Keith Barker, personal fave!) and Cisco Press books. They can be tricky exams, don't underestimate them.
I'd choose Cisco certs over say Network+ if I had to, I guess A+ is a good foundation if you're trying to get into the IT field but I personally never bothered with it.
Just get some books, maybe some training videos and budget the couple hundred bucks for an exam
Also, GNS3 (Especially with the newer beta versions) coupled with VirtualBox/VMWare are great for simulating most aspects of infrastructure for Network/Server labbing, at least I've found them invaluable