tips... hmmmm
watch your aquarium, watch for algae growth showing too much light for the level of CO2, watch for plants not growing to show not enough light, watch for fish not breathing to show too much CO2.
For the amount of CO2, don't worry about bubbles per second, each case will be different depending on plant level, CO2 dissolving efficiency, and how much gas it lost from your aquarium, for something quick invest in a drop checker and an appropriate solution depending on your required CO2 level. Or use a good test for pH and hardness and look up on the table for amount of CO2.
And remember that changing the amount of CO2 injected will take a decent amount of time to reflect correctly in a test. this is where BPS will be more useful, just to see a change.
And pH controllers can be a wonderful thing.