Add Introduction, closes #17

- General information about the T3 course

docs/00a-preamble/00-introduction.adoc

@@ -6,6 +6,15 @@
 == Introduction: General information about the T3 course
 // end::EN[]
 
+// tag::EN[]
+A Train-the-Trainer (T3) course is designed to enable trainers to efficiently and effectively deliver high-quality training content in iSAQB-accredited trainings.
+It is primarily intended for trainers and prospective trainers who conduct or intend to conduct iSAQB CPSA Foundation-Level trainings, but will not exclude software architecture trainers at other levels from participating.
+It focuses on enhancing expertise in the subject matter, effective teaching methods, creating a positive learning environment, and professional training delivery.
+Participants learn to design and deliver engaging, high-quality courses, manage group dynamics, and handle challenging training situations.
+The course also emphasizes continuous improvement and alignment with iSAQB values and standards.
+While it enhances training delivery skills, it is not a prerequisite for trainer accreditation.
+// end::EN[]
+
 include::01-00-important-terms.adoc[{include_configuration}]
 
 include::01-0X-rummage_box.adoc[{include_configuration}]