I know when I first started about a month ago... during my inaugural ride, thoughts that went through my mind ranged from "What the heck am I doing?" to "I should've just stick with transit all the way or drive". From "I think I may be in over my head here" to "OK I am clearly lost... which way should I go". From "Hmm.... never noticed these wild flowers before" to "I'm here already?"
Just do it.