Why does the Priest face away from the people when Mass is conducted?

This is a great question. We, as traditional Anglicans are steeped in tradition, by intention not by convention.
We face the East, ad oriented (Ecclesiastical Latin meaning “to the East”). We do the Holy Mass or Holy Communion "against the wall".
Our belief has been that when we as Priest face the people, we are performing. It becomes a show instead of worshiping the Divine.
Facing the people, a Priest becomes the focal point and what he is doing, or not doing as opposed to worshipping God. 

Our focus at Holy Mass is not theatrical performances or concerts, rather, worshipping God who is right to be magnified and glorified for all he has done for us! 

Why do the Creeds say "Catholic"? What does this mean?

In America, the term “Catholic” is usually associated with the Roman Catholic Church, however, the term comes from a Biblical Greek term for “universal”. To be Catholic is to be a member of the Universal Church founded by Jesus and his first apostles. The Catholic faith is rooted in Scripture, Tradition, the Creeds, the Holy Mysteries (Sacraments), and the historic ministry of Deacons, Priests and Bishop (within Apostolic Succession).​

Globally there are millions of non-Roman Catholics found in the many other Catholic churches including the Orthodox, Old Catholic, and Anglican churches. 

Anglicans are considered Reformed Catholics.

What denomination is Anglicanism?

Anglicanism is not a denomination. Instead, it is a Christian communion that doesn't subscribe to denominational theology. We are pre-denominational.
Anglicanism is one of the major branches of the 16th-century Protestant Reformation and a form of Christianity that includes features of both Protestantism and Catholicism. 

Anglicanism is a “reformed catholic” tradition, because it seeks to preserve the best insights of the Protestant Reformation while not throwing out the vast riches of the catholic (“universal”) Church’s tradition such as having Bishops, Priests, and Deacons, the liturgy, sacraments and the Church calendar.  
The theology of the founding documents of the Anglican church—the Book of Homilies, the Book of Common Prayer, and the Thirty-Nine Articles of Religion—expresses a theology in keeping with the Reformed theology. 

We are Catholic, Protestant and Reformed. We are conservative, liberal, right wing and left wing. But most of all we are CHRISTIANS who love the Lord, his church and reaching out to others and sharing that love.  

How is Anglican defined?

“Anglican” means simply that we trace our roots back to the Protestant Reformation when the Church of England rejected the authority of the pope and the teachings of the Roman Catholic Church. Later as the Church of England began to expand beyond the borders of Great Britain, so it was no longer appropriate to call the new churches “the Church of England,” so they began to be called “Anglican”.

In an important sense, the Anglican Christian tradition began when Christianity first reached the British Isles in the 1st–3rd centuries. Three British bishops were present at the Council of Arles in 314. The first Archbishop of Canterbury, Augustine, arrived in Kent in 597. However, in an equally important sense, Anglicanism began when the Church of England emerged as a distinct entity (from the Roman Catholic Church) in 1534 when King Henry VIII officially denied that the Pope had authority over the Church in England. While it is true that Henry VIII’s desire for the nullification of his marriage had something to do with this decision, there were also powerful nationalistic and reformational currents in play. Another important Anglican founding figure is Thomas Cranmer, Archbishop of Canterbury from 1533 to 1556 and architect of the first two Books of Common Prayer in 1549 and 1552.