Is this a valid university?

[DC Al Fine]

As SecularGlobalist said, there's no address listed, and the "denomination" it serves appears to consist of two parishes in the United States. That's a pretty big red flag.

Taking a step back from that,  there's some broader issues at play here. If you're going to seminary to do parish ministry or to work in some sort of church role, you want more than "valid". You want training that will enable you to serve in those roles and serve well.

Have you talked to your pastor or other church officials about your desire to go to seminary? In Presbyterianism, you "come under care" of your Presbytery well in advance of starting seminary, which includes having mentors who can help navigate pitfalls on the way to ordination (including seminary choice). The Mainline and other "high" churches are usually pretty good about this, so there's likely some sort of equivalent for you on your tradition. Some of the wording in your OP makes it sound like you are doing this all on your own, which if true, is pretty concerning. Get mentored!