Oh, and I should probably add this here.
Don't think at the early stage of your game that you need to have a method set in stone to tech chase 100% perfect everytime. Really, you're just too worried about it. Relax and you will realize that as you get better, you get so good at prediction against the average opponent, even pros, you can limit the options down to 2 or even 1 option that they are going to go with. Also, you'll become better at following techs naturally, don't get overly stressed about it!
Even if you can't punish the tech, you'll also learn several ways to punish predictable actions after they tech, it's similar to tech chasing really, you'll learn to watch for rolls/spot dodges/jumps/or the opponent to dash away after they tech. I'll just let people tech where they want to and then watch for what action they take after they tech and punish them for that in the exact same fashion I would origionally tech chase!
In summary, just keep working on your game and in a few months when you look back you'll see exactly what I'm talking about, you'll naturally get better at it, and you'll even get better at punishing the opponent even if you can't get to them in time.