These are different responses that I have heard while reading different post. Trying to figure out what is correct because I am sure many people have heard these.

Trimming yellow and bad leaves- good or bad?
-I’ve heard both ways. 1). Causes stress on plants or 2). Forces effort to new and healthy leaves

How long to add nutrients after a plant has been put into fertilized soil?
-I have heard these different responses. 1) wait 2 weeks 2) wait one month 3) start right away but only use a 1/4 mix.

Pot usage
-1) I have heard to go straight away to a big pot so there are no transplanting issues and 2) upgrade as the plant grows (personally dont know why).

How large of an open air space is needed to for clean fresh air to enter?
I’m not sure if this even matters. 1) Since you want to keep the temp constant and would like to save energy go with a small hole (I have heard even 4-6 in.)
2) A larger opening around 3x3 ft.

Thanks for your opinion.