Hi Jay,
Follow the below steps :
1. sqlplus /nolog
sql> connect /as sysdba
sql> startup
Then retry the steps in sapinst.If it fails again. Then paste the output of the below command
1. echo $ORACLE_HOME
2. echo $ORACLE_SID
3. ps -ef|grep smon
You also need to set up SSFS configuration
SSFS Implementation for Oracle Database
With Regards
Ashutosh Chaturvedi