Welcome, I hope your journey shall be filled with grace. Certainly you can do those things. In fact, I would say that prayers, fasting, etc. should be started as soon as possible. Just as a player cannot play at his fullest if he sits around during spring training, so too can we not worship as Christians if we just begin suddenly. We need training. Now would also be a good time to talk much with your spiritual father/ priest as it is good for y'all to build a repitoire and understanding for your spiritual benefit as soon as possible.