You should not take this so personally. I assure you if you were in our place, you would feel exactly the same as us. When I joined in, I was also asking this question. I guess back then the guys were not yet tired enough of answering it again and again. And I understand your position, because even with the search function, it is not so easy to find answers. Even if I wanted to point you to the posts which were answering your question, I would have to spend a lot of time digging through the archives.
In the end, we are just a group of casual people who are not getting paid by anyone, and with this attitude, you’re not increasing the chances of getting an answer.
I’m not going to do the digging for you, but what you can do, is go to top topics sorted by replies, and start reading threads related to IB or CT. For example:
https://forum.mustachianpost.com/t/interactive-brokers-for-dummies
https://forum.mustachianpost.com/t/switching-from-ct-to-ib
https://forum.mustachianpost.com/t/experience-interactive-brokers-2nd-chance
https://forum.mustachianpost.com/t/interactive-brokers-summary-and-costs
I’m pretty sure, once you’ve read all these threads, your question will be answered.