Hi thanks for your concern @crypto.piotr, I guess there's no much need to panic for new users as further regulated measure will be unvail soon.

These ban will not deter Nigerians from conducting their normal activities.
News source from Nigeria expert quote
CBN attention was drawn to how nigeria local currency are basically used for buying crypto asset which is causing major concern to nigeria government.

“They’re moving money from naira to crypto. That is what the CBN sees and has taken issue with. It is not banning crypto trading. It’s just telling financial institutions not to allow their platforms to be used to buy or sell crypto on exchanges like binance,” Olugbenga said.