I started installing the node according to this guide:
https://bitcoin.org/en/full-nodeAnd while the synchronization is in progress, I found that the node will not work without the static IP address. As I understand it, my ISP does not allow me to open an incoming port. Please, correct me if I'm wrong.
I ordered a static IP service and will continue installation in a couple of days, just at this point the synchronization of the network will end.
You don't need a static ip to run a full node.
Your ISP can't disallow incoming traffic. You just need to open the ports in your firewall and router. An alternative would be to publish your service via tor, then you don't need an incoming port.