You should be able to get at least to amateur and preferably Pro with the starter equipment.
While you are doing that read all the game hint threads especially the one to the right about putting tips and chip and pitch tips. NOTE: The putting is your big learning curve 42% of your score comes from putting read the tips and learn them.
Practice and take notes, every time you make a slightly unusual shot (rough, sand etc) write down what you did, wind strength and direction, lie etc, that way next time you end up there for you will), you know what to do (or what to not do).
Once you get to Pro then start to equip with better clubs a 9.5 degree driver (the WGT Tour Pro one is a decent club and cheap), then get three wedges and ditch the hybrid.
Learn all the shots and know your clubs, practice shots, Bethpage back 9 esp #5 to #7 are good for practice as they have large areas to use. Set it up with low wind and go up and down the fairway with each club and each shot type, and average the distance (to negate the wind effect), do this for every shot type, full shot, no spin, backspin and topspin, punch no spin and backspin, then chip, pitch and flop. Write this all down, it should become your WGT bible and every time you change your clubs you do it all over again.
Once you have made tour pro or master, you should have read enough threads about clubs to start to decide what clubs you want to use.
Most people will use the starter set to Pro, then another set from Pro to Master then upgrade again to get to legend or tour legend (if they get there, I'm not sure I ever will).
Good luck, have fun and remember, IT'S ONLY A GAME!