I still have a lot of UTNP, where and when can I swap these for UTN?
You can keep UTNP for over a year ahead and secure those on an hardware wallet. The swap UTNP>UTN will be soon available but for now it's not necessary.
I registered a new wallet in the main network, got everything you need to access it, but now I can not go to it. After entering the required data, the page does not stop loading and nothing happens. Has anyone had such a problem?
You need to ask some help on TELEGRAM

an Admin will assist you.