Perhaps not a requirement, but a good idea to introduce yourself beforehand if possible.
Eastern Catholic parishes tend to be smaller, close knit communities, like many Orthodox parishes. The priest will call parishioners and regular guests by name when receiving the Holy Eucharist, as is our custom. So, at the very least, it will allow for a more complete and proper Eucharistic experience for you.
If it is clear that many visitors are in church, priests will typically make an announcement regarding the manner of reception of the Holy Eucharist, along with a polite reminder that one must be properly disposed. If you are the sole visitor that day, with an introduction, the priest might bring it up privately, but they always welcome a respectful question on the subject.
Hope you have the opportunity at some point in the near future to experience an Eastern Catholic Divine Liturgy!