You are correct. If you are not in the Church as yet, you should stay seated. The communion line is only for those Faithful who are true Catholics and not in a state of mortal sin. You will notice also that the altar boy will hold a paten under the throat of every one who receives. That is so that not even a crumb containing the Body and Blood of Christ is lost. Notice how vigorously the priest cleans these into the chalice, and then consumes any crumbs that happen to be left.
In your case, it is beautiful to say a "spiritual communion" and many Catholic prayer books have such prayers. They are quite beautiful.
http://www.fisheaters.com/TLMmissingmass.html
I particularly love the prayers of St. Thomas Aquinas who wrote incredibly beautiful prayers on the Eucharist.
Your Easter this year will be very special. May God be with you on this beautiful Faith journey! Keep in touch by Freepmail! I would love to hear of your continued journey into the Church and to pray for you on your way!
Frank