By the rubrics in the CCEO (Canon Law for the Eastern Catholic Churches), where practical:
Major Seminaries are supposed to be a 4 year collegiate program including theology, church history, homiletics, canon law, logic, daily prayer regime, and being taught the specifics of the Rite and Church in which they serve. Ideally it is also a residential program, and includes participation in local parish activities as befits their station. Where liturgical languages are used, they should also be taught.
There is a decided preference for it being a master’s degree.
Alternative equivalent programs of formation may be used, especially for married men destined for the parochial clergy.
Deacons must have 3 years of seminary, or equivalent training. Distance education in the Ruthenian Metropolia of Pittsburgh is 6 years for the deaconate.
Minor orders are not required to have attended seminary, but are required to have adequate formation and instruction, and may also have specialized education apart from the major seminaries.
Currently, the Ruthenian Metropolia of Pittsburgh has a Metropolitan Cantor Institute, and permits ordaining cantors, but I do not believe such ordination is provided for MCI students, but in theory, it can provide the needed formation should the Eparchs and/or Metropolitan decide to ordain Cantors.
Note that Eparchs/Bishops must have 5 years as a priest, and a Doctoral degree in Theology or Canon Law, or equivalent experience. (Almost all have such degrees, and much longer priestly careers.)