How to get metadata of an object dynamically

String types='di_mapping_definition_steps__c';

Map<String, Schema.SObjectType> schemaMap = Schema.getGlobalDescribe();

Schema.SObjectType objectschema = schemaMap.get(types);

 Schema.DescribeSObjectResult objectdef=objectschema.getDescribe();

string objectlabel=objectdef.getlabel();

Map<String, Schema.SObjectField> FieldsMap = objectdef.fields.getMap();

    system.debug('***objectschema****'+objectschema);

  system.debug('***objectlabel****'+objectlabel);

system.debug('***objectdef****'+objectdef);

system.debug('***FieldsMap****'+FieldsMap);