Regarding goal setting, I have found in any pursuit make both short and long term goals, whether bowling, playing other sport, progressing on a music instrument, whatever. Short term goals are something in the relatively near future with all things being equal, you can achieve with some effort. Now long term, well start with a 600 series, or perhaps a 170 aver (if u are new to bowling). Whilst many bowlers here seem to be 200+ av bowlers, a 170 is a decent average due to the fact you have to make the vast majority of your spares still, some may disagree.
i have made goals in bowling like when I started the regular goal of a 200 game, and then a 500 series. Now, three years later, Ive made further goals some short and long term, some have been achieved, whilst others are coming..
The most important thing about goal setting in bowling, is to make sure your fundamentals are correct, without it, you may flounder around for a bit, this is from experience. You develop your own technique, in most cases with a slight flaw or two, and you reach a point that u seem permantely stuck on.
See a coach, if u are serious and have the time. Me its the time factor, still improving, so I can't complain too much....
See ya LL