....I have tried to create an account on that exchange (ftx.com) to see the minimum amount of withdrawal but I can't found anything on the necessary page, if you want to know the exact amount the minimum amount of withdrawal I would suggest to ask it to their support.
When that happens, you can also try searching in their other social channels like twitter, telegram etc.. bc there's always a fair chance that someone has asked the same thing especially when it comes to basic questions. and yeah since no one was sure, here:
as for the withdrawal fee, op can pretty much trust what the article says (which noorman0 linked) since it's from the exchange itself. It's very weird that you have to ask for such info tho, cause the standard is for it to be displayed in the withdrawal section and their support articles.