NAS synology DS223j guide

Please help, guide from build server and how to use yacreader.
its 1st time user. just bought nas for 1 week, using yacreader for 2-3 days.
i use it at pc library, its works like magic for me. fast, efisien an worthy. so i wanna try it with nas.
i already try using couple suggestion at this forum, theres nothing work. only thursday that can make it server online, but i cant joint it with my hp app. any sugestion?
i think it got it wrong from nas firewall, any help?

I can't give much more information than the one I sent you by email. You can try the Discord server to see if other users can help you.

ok. will try it.