why am i not getting the data of record and just lable in visualforce page? - salesforce

Question

attched is my output
enter image description here
Bolow is my visulforce Page and apex page
i am expecting output as a single record in 2 column and has next and previous button to next and previous record.
//apex
public with sharing class MyController
{
public list<Patient__c> objectList = new List<Patient__c>();
public list<Patient__c> currentObject {get; set;}
public integer i;
public MyController(ApexPages.StandardSetController controller) {myAction();}
public string selectedValue {get; set;}
public boolean myBoolean {get; set;}
public void myAction()
{
if ( selectedValue == 'List View') { myBoolean = True; }
else { myBoolean = False ;}
}
public Patient__c getCurrentObject()
{
return currentObject[i];
}
public void goToPrevious(){
if (i>0){i--;}
}
public void goToNext() {
if (i < currentObject.size() - 1) {
i++;
}
}
/* public void goToRecord (Id recordId) {
for (Integer i = 0; i < objectList.size(); i++) {
if (objectList[i].Id == recordId) {
i = i;
break;
}
}
} */
}
Below is my visualforce page code.
<apex:page standardController="Patient__c" extensions="MyController" recordSetVar="Patients">
<apex:pageBlock title="Patient Records...!!!">
<apex:form >
<div align='center' style=' color:blue;font-size:10px '>
Your selection is {!selectedValue}
</div>
<apex:selectList label="View Type" value="{!selectedValue}" size="1">
<apex:selectOption itemvalue="Standared View" itemLabel="Standared View"/>
<apex:selectOption itemvalue="List View" itemLabel="List View"/>
<apex:actionSupport event="onchange" action="{!myAction}" >
</apex:actionSupport>
</apex:selectList>
</apex:form>
<apex:pageBlock rendered="{!myBoolean}">
<apex:pageBlockTable value="{!Patients}" var="Pa" >
<apex:column value="{!Pa.Name}"/>
<apex:column value="{!Pa.Contact_Number__c}"/>
<apex:column value="{!Pa.Email__c}"/>
<apex:column value="{!Pa.Age__c}"/>
</apex:pageBlockTable>
</apex:pageBlock>
<apex:pageBlock title="Standared View" rendered="{!!myBoolean}">
<apex:pageBlockSection columns="2">
<apex:outputField value="{!Patient__c.Name}"/>
<apex:outputField value="{!Patient__c.Age__c}"/>
<apex:outputField value="{!Patient__c.Email__c}"/>
</apex:pageBlockSection>
<apex:form >
<apex:commandButton value="Previous" action="{!goToPrevious}" />
<apex:commandButton value="Next" action="{!goToNext}"/>
</apex:form>
</apex:pageBlock>
</apex:pageBlock>
</apex:page>
I am expecting as a single record showing page where have next and previous button to go net and previous record.