A WRONG RWY TKOF ON RWY 30L WAS ATTEMPTED BY A PVT PLT IN A GRUMMAN AA5A PLT AT HOU; TX.

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THIS WAS MY FIRST TIME AT HOU; AND I WAS UNFAMILIAR WITH THE ARPT OR LCL PROCS. I FILED AN IFR FLT PLAN FROM HOU TO NEW; RECEIVED CLRNC; CONTACTED GND AND WAS TOLD TO TAXI FROM MY POS AT PARKING TO RWY 12R AT TXWY L FOR A MID RWY TKOF. WHILE TAXIING AND APCHING TXWY L; I WAS TOLD TO MONITOR THE TWR. JUST AFTER I TURNED ONTO TXWY L; I WAS CLRED FOR TKOF. I WAS NOT EXPECTING THIS. I WAS STILL COMPLETING MY CHKLIST. I SHOULD HAVE REJECTED THE TKOF CLRNC; BUT ATTEMPTED TO COMPLY AND RUSHED THROUGH MY CHKLIST (OMITTING TO SET THE PROPER SQUAWK). I THOUGHT I HEARD THE TKOF CLRNC TO TURN L ONTO RWY 12R. (IT SHOULD HAVE BEEN A R TURN.) I WAS CONFUSED BY THIS CLRNC; BUT SAW ANOTHER ACFT ON THE OTHER RWY; GOING TOWARD RWY 30R AND ASSUMED IT HAD JUST LANDED AND THOUGHT THAT THEY HAD SWITCHED RWYS. I SHOULD HAVE QUESTIONED THE CLRNC; BUT I GUESS I GOT INTIMIDATED BY THE CTLR'S URGENCY. AS I RECALL NOW; MY READBACK WAS NOT ACKNOWLEDGED. I STARTED MY TKOF ROLL; AND WAS TOLD TO ABORT AND CONTACT GND. GND BROUGHT ME BACK AROUND TO RWY 12R AT INTXN G1. I WAS THEN CLRED FOR TKOF ON RWY 17. INTXN G1 FACES APPROX 120 DEGS AND THERE IS A RWY 12R SIGN AT INTXN G1; AND A RWY 17 SIGN IN THE DISTANCE. THIS WAS DISORIENTING TO ME; AND I SAID THAT TO THE CTLR. HE THEN GOT VERY UPSET WITH ME AND ASKED THAT I CONTACT GND. AFTER STUDYING THE ARPT DIAGRAM; I REALIZED THAT INTXN G1 CTRLINE CURVES AROUND ONTO RWY 17; AND UNDERSTOOD WHERE I WAS. GND SENT BE BACK TO TWR; AND THE TWR CLRED ME AND ASKED THAT I CALL THE TWR WHEN I LAND. THE FLT PROCEEDED UNEVENTFULLY. LESSONS AND SUGGESTIONS: 1) I ALLOWED MYSELF TO BECOME RUSHED BY THE CTLRS (I SHOULD KNOW BETTER). 2) I SHOULD HAVE QUESTIONED THE TKOF CLRNC. 3) I SHOULD HAVE GOTTEN POSITIVE ACKNOWLEDGEMENT OF MY READBACK. 4) RECEIVING A TKOF CLRNC WHILE STILL TAXIING IS NEW TO ME. I HAVE NEVER RECEIVED THIS BEFORE; OR ENCOUNTERED IT IN TRAINING IN OVER 10 YRS OF FLYING. I ASSUMED THAT I WOULD HAVE TIME AT A 'RUN-UP' AREA TO COMPLETE MY CHKLIST; AND GET READY FOR TKOF. I RECOMMEND THAT BEING PREPARED FOR THIS PROC BE INCLUDED IN TRAINING. 5) THE SIGNAGE AT INTXN G1 SHOULD BE IMPROVED. THERE SHOULD BE A MORE CLR INDICATION THAT IT IS THE ENTRY TO RWY 17 AND NOT RWY 12R.