I need new golf clubs, specifically irons/putter/woods?

Hello, im male right 21, wish i cud tell you my handicap. Been golfing since i was 12, leisurely. On a local nine (cheap) if i play consistently every week i can shoot low 40s for nine. im sure i can do better with practice. o btw, do you think it wud be weird to keep my 7 from my old set? hit a hole in one when i was 16 with it ; ) I can spend like 300, but wud you recommend used ebay? fitting? brand? the more nicer the clubs the more time ill b golfing. Maybe golf 3-5 times a week if i got new clubs. Always wanted to have pings since i was little. some childhood infatuation. right now im using some old adams, i think were 180 new. im ready for the next step in my golf life : )