I don't know how far along you are in the conversion process, so it's hard to give advice. If you are already somewhat a regular at an Orthodox Church and the priest there knows you and where you are headed, it is best to seek his advice.
But here's my own experience, which is by no means intended to be a model for you. Others who respond may have other views.
During the months of my attending an Orthodox Church and an Evangelical Protestant church where I had been a life-long member (of the denomination, not necessarily the local congregation), I continued to receive Communion until one particular Sunday. In many EvanProt churches, the Communion ritual is not fixed, or if there is one, is optional "for pastoral reasons". I put those words in quotation marks, because in my experience it usually meant "for the pastor's own ego." On the Sunday in question, the pastor as was his practice was not following the denominational ritual, but ad libbing everything. He said at one point, "And Jesus said, 'This is a symbol of my body; this is a symbol of my blood". Jesus said no such thing! I found myself saying silently, "If you have to deliberately misquote Jesus because of your theology, something is very wrong." I did not receive Communion that morning, and determined that my next receiving would be as an Orthodox Christian. At that point, I had no idea how long I would wait for that. As it turned out, it was about six months. It was worth the wait!
When I put the claims of Evangelical Protestantism next to those of Orthodoxy on the matter of Communion, it was easy to see where I stood.