I know you are all excited, but please use the sentence discussions only for language-related questions and answers. Irrelevant posts clutter the discussion and prevent others from getting answers easily and also afterwards finding the relevant/necessary answers becomes very difficult.
Turkish verbs may have lots of different suffixes depending on the time, person, sometimes intention or the type of the sentence. Verb has a much more complicated role in the sentence then it has in european languages. thus it is a complicated issue not very suitable to be explained here. But in short the answer to your question is "no" simply it is not always -ar -er
I couldn't find a place I said "irregular". There are lots of different verb endings as you know (-ar -er -ir a few exceptions) in aorist and many other tenses. So I said "answer is simply no, verbs doe not alwas end with -ar & -er for 3rd person in Turkish". I am sorry If there are any implied intensions that makes the question differen from what I understood, I missed out
-er/-ar is only used for one tense (called Aorist). And it's not even just -ar/-er; within the same tense, you also sometimes get the -ır/-ir/-ur/-ür endings, depending on the verb.
But then there are other tenses too. I believe the number of the tenses in Turkish well exceeds 20. You will learn them all as you progress.