To receive Holy Communion in the Episcopal Church, one must have been baptized in the name of the Holy Trinity (excluding LDS because of differences in the understanding of the Trinity). Canon I.17.7: “No unbaptized person shall be eligible to receive Holy Communion in this Church.”
My particular parish states in our bulletin that “All those who have been baptized in the name of the Holy Trinity and believe in the real presence of Christ in the Blessed Sacrament for the remission of sins may receive.” (My wording may be a little off, I can’t remember what it says verbatim.)
That being said, there is no official structure in the Episcopal Church for First Holy Communion, although I know of many parishes that do have classes for children when they reach a certain age (7 or 8) to prepare them to receive communion and they receive First Communion together at the end of the process.
Of what I understand, the Anglican Church of North America (ACNA) has the same rules regarding receiving communion per their canons “2. No one shall receive the Sacrament of Holy Communion except they be baptized, with water, in the Name of the Father, and of the Son, and of the Holy Spirit; 4. The admission of baptized young children to the Holy Communion is permitted in this Province; 5. Members in good standing of other branches of Christ’s Church, who have been baptized, with water, in the Name of the Father, and of the Son and of the Holy Spirit, are welcomed to receive the Sacrament of Holy Communion. The qualifications concerning rightly and worthily receiving the Supper of the Lord with faith are provided in Article XXVIII of the Thirty-Nine Articles of Religion.”