Take it slow
Bluesteak, it sounds like you already have experience playing blackjack in the casino and now you're trying to add counting.
My advice would be to start with a really simple count like A-5 until you begin to feel more comfortable. Sit at a full table, chat with the dealer, laugh it up with the ploppies, and practice keeping the count. Flat bet as much as possible and then just jump up your bet to 2 units when you have the advantage. It is highly likely that absolutely no one at the table even notices or cares about your change in bet.
When you start to feel like you can play without getting nervous try upping your top bet a little more (and a little more...and so on). Once you're comfortable with modifying your bet without freaking out about it, try using a more sophisticated but still simple counting system like a level 1 unbalanced system. Keep progressing and pushing yourself to get better in live play, but it's okay to start simple and take baby steps, just don't waste away your whole bankroll while gaining the experience you need to be great!
This is pretty much the route I have taken. I'm a young guy who was a ploppie [and fortunate enough to achieve positive variance with a progression betting system] for over a year. I started out with A-5, then Speed Count, then Red-7, now I'm using Hi-Lo and working on adding more index plays (as well as an Ace side count). My heart rate still rises a bit when I get those huge + counts and start pushing in more chips but I have noticed my comfort level rise with my experience.