Mikrotik+Dynamic external IP+web server+win sharing (open port)?

Question

Windows

Good time.
I have a Mikrotik RB952Ui-5ac2nD 192.168.88.0/24 A
machine with a Web server 192.168.88.34 (web port 80)
the same machine with a shared folder Data 192.168.88.34 (used as storage, not replaced by something more useful due to stinginess some individuals)
there is currently a Rostelecom Internet with a dynamic address ... because. there is no technical possibility to highlight the statics, so the noip service is used for the convenience of solving the problem. for beauty, an example: mysite.ddns.net
I configured mikrotik to work with Rostelecom's PPPOE,
there is Internet, but data from Rostelecom is not issued to the DHCP client

. But the Internet is there and works well.
I forward ports from outside to 192.168.88.34 (80),
from computers in the locale it opens by local ip, because I did that from local computers and by ip external and, accordingly, by mysite.ddns.net it also opens, but from outside, I can’t connect,
I conclude that the port is not forwarded from outside, but I don’t I can specify an external ip, because it is not there, so I indicate the interface of Rostelecom.

In addition, it is required to open access to the shared folder from outside (it is possible to change the method) it all depends on the ease of use, because woodpeckers sit on the other end.
I am not an expert in mikrotik equipment, but there is such a need, I understand a lot of things, but at the same time very little.
Therefore, perhaps links to detailed guides and a detailed description will come in handy.
thanks in advance.

Answer 1

In addition to NAT rules, you also need to configure Filter Rules, specifically chain forward.
The address on PPPoE can be viewed ip->address, for example.

Answer 2

thanks for the direction tips. dig, dismantled, earned.
There is a question of Windows sharing (shared folders),
how to make access to it from outside, or how to replace it, so that access in setting up and using it would not be more difficult