Thank you for your thoughtful response. May I ask why the suggestion to wait until Pascha? What, if any, difference is there in our Lenten preparations as catechumens vs. already being Orthodox?
Right now, we are in an awkward position as we have left our former Byzantine Catholic parish and attend liturgy solely at our "new" church; the awkwardness is that we are not in a state of grace in the Catholic church, and we are obviously unable to receive Communion yet in our new "home". We could go back to our old church, confess, receive Communion there, and attend liturgies at both churches, but that would confuse the children and would be contrary to what our beliefs are.
I do respect the idea of waiting. It would be pose some difficulty, though.
It's a difficult position. I was Protestant prior to my conversion to Orthodoxy, but once I recognized the Church as such, I couldn't commune there anymore, even before I was officially made a catechumen (several months later...but that's another story). I spent roughly a year out of communion with EVERYONE. About half of that year I was simply an inquirer who was convinced of Orthodoxy (even though I was unable to return to the parish I was attending, having to move back to my hometown for awhile). So, I attended a Protestant church pastored by my uncle, and I enjoyed being an vocal presence (as I had been before) although I stepped down from all of my lay positions there and would not commune. The other half was after I was able to move back up to my parish, be enrolled into the catechumenate, and go through my final preparations before baptism. It was tough.
That said, I would do it again. I wasn't baptized at Pascha, but Palm Sunday, so I was able to experience Holy Week as a member of the faithful, while still experiencing Great Lent as a catechumen. That was very special to me, to know that that time was specifically designed by the Church to prepare me for illumination. I took great comfort and even joy in the prayers "for those preparing for Holy Illumination" at the Pre-Sanctified Liturgies. It was all very beautiful and moving for me. I will always treasure that experience.
However, I also understand your desire to commune and be received into the Church. I think any of the Great Feasts are a good opportunity (the next one is the Entrance of the Theotokos in the Temple (Nov. 21), and then Christmas. Also, the feast day for any saint that is special to you, or an otherwise important (widely venerated) saint. In the next few months, we have a lot! They include (dates given are for the New Calendar):Luke the Evangelist (Oct. 18)Demetrios the Greatmartyr and Myrrhgusher (Oct. 26)
John (Kochurov) the New Heiromartyr (Oct. 31)Synaxis of the Archangel Michael and the others (Nov. 8)St. John Chrysostom (Nov. 13)
Apostle Philip of the Twelve (Nov. 14)
Righteous Emperor Justinian (Nov. 14)
Gregory Palamas (Nov. 14)Apostle Matthew the Evangelist (Nov. 16)
The Right-Believing Great Prince Alexander Nevsky (Nov. 23)
Greatmartyr Katherine of Alexandria (Nov. 24)
Heiromartyr Clement, Pope of Rome (Nov. 25)
Clement of Ochrid, Equal-to-the-Apostles (Nov. 25)
Apostle Andrew the First-Called (Nov. 30)
Greatmartyr Barbara (Dec. 4)
Alexander the New Heiromartyr (Dec. 4)
Venerable Sabbas the Sanctified (Dec. 5)Nicholas the Wonderworker, Bishop of Myra (Dec. 6)
Ambrose, Bishop of Milan (Dec. 7)
Conception of the Theotokos by the Righteous Anna (Dec. 9)Venerable Herman of Alaska (Dec. 13)
Heiromartyr Ignatius the God-Bearer, Bishop of Antioch (Dec. 20)
Protomartyr Stephen (Dec. 27)
While these are all important, I realized after the fact how long a list I made! So, I went back and bolded the "really" important ones. Also, if there's an Old Testament figure you and your family have a particular devotion to, they probably have a feast day during Nativity Fast, which is dedicated mainly to OT figures. Anyway, I hope this is helpful and not too much info! Best wishes as you discern this most important event in your life!