STUDENT PLT RPTS A RWY INCURSION DURING TAXI AFTER LNDG ON AN UNFAMILIAR RWY.

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FLYING INTO LIVERMORE AIRSPACE I NOTICED THAT THE ARPT WAS VERY BUSY WITH ARRIVING ACFT. I WAS CLRED TO LAND ON RWY 25R; THE ONLY RWY THAT I HAVE SOLOED ON AT LIVERMORE. APPROX 4 MI OUT ON FINAL; I WAS INSTRUCTED TO CHANGE RADIO FREQS AND CHANGE TO RWY 25L WHERE I WAS CLRED TO LAND. NO PROB; MOVED OVER AND WAS A LITTLE LESS THAN 1 MI FINAL FOR RWY 25L WHEN ANOTHER PLANE STARTED TURNING BASE TO MY L; DIRECTLY TOWARD MY FLT PATH. CALLED TWR THAT I HAD TFC CLOSING AND THEY HAD THEM EXTEND THEIR DOWNWIND. THEIR ORIGINAL CLRNC WAS TO LAND BEHIND ME. OKAY; LANDED SAFELY AND WAS INSTRUCTED TO TAXI R. I DID SO; BUT MY NERVES WERE STILL A LITTLE ON EDGE WITH THE LAST MIN RWY CHANGE AND PLANE TURNING IN ON ME ON FINAL AND I MISSED MY CROSS AREA. THE TWR THEN ASKED ME TO TAXI TO THE END AND HOLD SHORT OF RWY 25R. WELL; EVEN LOOKING AT MY MAP OF THE ARPT; I THOUGHT I HAD TO CROSS RWY 25L BEFORE COMING TO RWY 25R. THAT WAS MY MISTAKE; AT THE END OF THE TXWY; THE ONLY RWY IS RWY 25R; WHICH I MISTAKENLY CROSSED. I KNEW IMMEDIATELY THAT I MADE A MISTAKE AND ONCE CLRED OF THE RWY WAITED ON TWR TO GIVE ME FURTHER INSTRUCTIONS. I WAS CORRECTED STRONGLY FROM THE TWR; I APOLOGIZED; NOT BEING FAMILIAR WITH THAT SIDE OF THE ARPT AND BEING A STUDENT PLT THEY SEEMED TO UNDERSTAND; BUT I FELT AND STILL FEEL BAD ABOUT THE INCIDENT. I WAS LUCKY THAT THERE WAS NO ONE USING THE RWY 25R AT THE TIME; AND I KNOW IF THERE WERE IT COULD HAVE BEEN A VERY POOR OUTCOME. I HAVE SINCE STUDIED EVERY RWY MARKER; TOOK EVERY SAFETY PROGRAM THAT I CAN FIND ON RWY AND TXWY PROCS. EVERY ARPT THAT I FLY TO; I WILL STUDY THE RWY AND TXWY DIAGRAMS AND HAVE THEM AVAILABLE ONCE I LAND. MOST OF ALL; IF I'M UNSURE OF ANY INSTRUCTION; I WILL VERIFY WITH THE TWR BEFORE PROCEEDING. I HAVE TOLD MY INSTRUCTOR ABOUT THE EVENT AND TOLD HIM TO MAKE SURE THAT HIS OTHER STUDENTS GET MORE INSTRUCTION ON ARPT AND RWY SAFETY. TOO MUCH TIME IS PLACED ON FLYING THE PLANE AND NOT ENOUGH ON RWY SIGNS; AND TAXI PROCS. ESPECIALLY FOR RWYS THAT YOU MIGHT NOT HAVE BEEN USING AS A SOLO PLT WHILE STILL A STUDENT.