Yes, 30micro 60bloom should be a good starting point.
It's really about the 1:2 ratio, 1 part micro to 2 parts bloom. Works good for a lot of people, very simple and reliable.
It's always better to give a little less than too much, and 6/12 is often enough.
Watch the plants. If they show signs that they are hungry and need more you can slowly up the dose to 8/16 per gallon max.
Usually they don't need more than that.
No, don't cut of leafs unless they are dying or severely damaged!
If they are green they are still working.
You don't have that much leafes anyway, so you don't want to loose any more.
And stop the yeast thing. You really don't need it.
CO2 is only beneficial if everything else is near perfect and in your situation it will probably do more harm than good.
Focus on the very basics for the first few grows until you have gained some experience and knowledge!
It's not the time for experiments yet!
So, there are some questions left, :
1 Is your tap water really only 60ppm?
That would be pretty good.
2 Look at the micro bottle. Does it say hardwater or softwater somewhere?
If not, can you find how much Ca is in there?
3 What medium are they in and what size are the pots, how often do you irrigate and how much runoff do you get?
Or is it a recirculating system?
4 Measure pH and EC/ppm of your nutrient solution before you irrigate and measure pH and EC/ppm of your runoff.
Then we can figure out if everything is fine.
5 What lights do you use and how big is your tent/grow space?
They don't look that bad. Don't worry too much, if you go slow, keep it simple and focus on the basics you should get some nice buds.
And I forgot:
Identify what that bug is as fast as possible.
Look up common pests on some growing site and you should be able to figure out what it is.
You have to know, you can't just spray with something. You need the right thing for your specific pest.
Once they really start budding it's getting much more complicated.
Btw. can't watch the videos, only mobile internet atm...
