WELCOME TO THE BOARDS!
regarding your questions:
learning when to adjust is key, as oil on the lane breaks down (is removed/moved around by the balls) in order to continue to strike you need to move (left for a right handed bowler). that being said, since consistently is an issue, you should never move because you don't get a strike if you miss your target, adjusting off a bad shot will just lead to more issue.
Couple questions: what is your average and what ball did you get?
The best way to improve your consistency is to practice practice practice! make yourself a routine for every time you get up on the lane and do the exact same thing.
Bookmarks