Short answer is yes you should always consult your priest before you take up a new spiritual practice
This. You're an inquirer, and so there's absolutely no requirement for you to join in on the fasting/feasting seaons of the Church. That said, it's a good idea, when one feels comfortable doing so, to involve themselves in the life of the Church and learn about it by doing
. To me, this is by far the best way to learn about Orthodoxy.
That said, the priest is our spiritual father, and should always be aware of our spiritual state. That means knowing our sins, how we keep our prayer rule (and what our prayer rule is) and other spiritual exercises and struggles we are having. In this, he can guide us, so we do not end up either apathetic to our spiritual journey or burnt out from overzealousness.