Lord have mercy!
And now some my thoughts
Before my chrismation in the Orthodox Church I was also really scared: how I would manage to observe fasting and prayer rules, if I would go the Sacraments with appropriate regularity, if I would confess well to my new confessor etc. Maybe stupid thing, but I was considering myself a bit unworthy to be Orthodox christian because of my sins, that I would behave in a manner that doesn't fit to an Orthodox Christian and my friends would notice it and they would think something bad about Orthodoxy. But, thank God, after more than half year being officially member of the Orthodox Church, I don't have any of these fears. As my priest said (very simple, but so useful) "If we have good intentions, God always helps us, He gives us (and also for the fulfillment of this intention or idea) a blessing". Converting into Orthodoxy for sure is a good intention
, so just be calm, pray, talk with your priest and all things will be OK.