Get a part time job. If need be, put off nursing school to get the money first and work full time. If you have to wait until you're 18, so be it. It's not that far off. Obstacles and postponements...
I could also add that watching telemetry means you have to learn to distinguish dangerous arrythmias (specifically vtach and torsades) from artifact, which is when the EKG tracing wiggles in a mess...
Be wary cross training into new skills because chances are you'll end up like me -- exploited and dumped on. You'll be hired for a position and the next thing you know, they're forcing you to work...
What type of cardiac unit? I would suggest this: Be very wary in cross-training to multiple positions (CNA/tele tech/Unit Secretary) for chances are you are going to be stiffed in wages, exploited,...
CNAs in hospitals do a wide variety of work. You could be a CNA in day surgery or the main OR. Hospitals are different than nursing homes unless you work on a unit that takes hospice-type patients. I...