This is a good way to start fertilizing: _Dosing Regimes_
If you later want to modify the dosages you can do so.
The best way to use CO2 is to use the plants to tell you if you have the right bubble rate. Use a drop checker to get into the right general range of bubble rates - green drop checker - then slightly increase the bubble rate, and watch the plant's reaction for 2-3 days, to see if the plants do better, pearl more, grow faster, etc. If they do, slightly increase the bubble rate again and repeat, until the plants don't seem to do any better. Then back off to the last bubble rate where the plants did improve. That would be the optimum bubble rate for the plants. While doing this keep an eye on the fish to be sure they aren't in distress from the CO2 - clustering at the surface, usually in a corner, laying on the substrate, losing their colors, etc. If you see that behavior, drop back to the bubble rate where you didn't see it.
This works best if you make sure the water is well oxygenated, good water surface ripple over the whole tank, use a wet/dry filter, keep up with tank, filter, water cleanliness, etc.
It is extremely unlikely you did any harm to your plants with CSM+B. It would take a really massive overdose to do that.