A PA28 PVT PLT CREATES AN INCURSION OF CLASS C AIRSPACE NEAR FLINT; MI.

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I WAS PRACTICING A VFR DIVERSION ON A SOLO TRAINING FLT IN PREPARATION FOR CHK RIDE. I WAS DIVERTING TO LINDEN/PRICES FIELD (9G2) UNDER OUTER CLASS C RING OF FLINT; MI. THE FLOOR OF THE SHELF WAS 2100 FT MSL. I WAS AFRAID I MIGHT ACCIDENTALLY PENETRATE THE SHELF ON MY DSCNT TO 9G2. UNFORTUNATELY; ON CALLING UP FLINT; I DID NOT MAKE MY INTENTIONS CLR. I SAID 'FLINT APCH; ACFT X 6 MI W OF LINDEN/PRICES INBOUND; LNDG RWY 27.' THE RWYS AT LINDEN ARE RWY 9/27; BUT ALSO AT FLINT. THE CTLR ASSIGNED ME A SQUAWK AND CLRED ME TO LAND ON RWY 27. I REPLIED 'CLRED TO LAND RWY 27; LINDEN/PRICES.' THE CTLR WAS STARTLED BECAUSE HE ASSUMED I WAS HEADING FOR FLINT ARPT. INDEED THERE WAS NO REASON WHY HE SHOULDN'T HAVE THOUGHT THAT. I SHOULD'VE SAID 'LNDG LINDEN PRICES.' I HADN'T PLANNED WHAT I WAS TO SAY BECAUSE OF THE DIVERSION PRACTICE REQUIRED ME TO STAY SOMEWHAT UNFAMILIAR WITH MY DIVERSION ARPT. ANYWAY; HE TERMINATED RADAR SVC AND ASSIGNED SQUAWK 1200. AFTER TOUCH-AND-GO LINDEN; I DECIDED TO AVOID FURTHER CONTACT WITH FLINT BY STAYING AT 2000 FT MSL (BELOW CLASS C). I KEPT ON A HDG OF 270 DEGS FOR WHAT I THOUGHT WAS 4-5 MI. THAT WOULD'VE PUT ME CLR OF CLASS C AIRSPACE AT FLINT. MY NEXT STOP WAS OWOSSO; MI; AND I TURNED TO ABOUT 310 DEGS TO GET THERE. SOON THEREAFTER; I SAW A TOWN WITH XING RAILROADS SO I HAD VISUAL CERTAINTY OF WHERE I WAS. I WAS ALARMED TO FIND OUT I WAS INSIDE CLASS C OUTER SHELF AT 3000 FT MSL ABOUT 1-2 MI. I HAVE DECIDED I AM IN NEED OF REMEDIAL TRAINING IN RADIO COMS AROUND CLASS C ESPECIALLY WHEN MY RTE IS JUST OUTSIDE THE AIRSPACE. I PLAN TO DISCUSS THIS EVENT WITH MY INSTRUCTOR AND LEARN PHRASEOLOGY TO BETTER COMMUNICATE MY INTENT AND TO PROTECT MYSELF FROM INADVERTENT PENETRATION OF CLASS C AIRSPACE.