How or when should I use ㅂ and ㅍ , ㄱ and ㅋ or ㄷ and ㅌ when all can be used for initial writing? ㅂ can be p or b, same goes to others. Which is very confusing.

What you ask on their own without annotation in Latin translated Korean, and also English during sample build. It of kind part basic counting and also basic language

You cannot social with this set nor analysis, but you can start your work in transliterate

What

ㅂ b

ㅍ p

ㄱ g

ㅋ k

ㄷ d

ㅌ t

map to in pseudonym of Latin

He differ in approach, but basically in doctor of linguistics. You work on allophone and allomorph, and even if impaired in translate writing

You focus on sample word of meaning in morpheme, worth analysing, or examine context bound content word

So that it not matter of assessing how they language, like you feel right, it only right for English to officiate, in Latin

To compiler and also expert computational linguist, this also matter of ergonomic computer keyboard, and how feasible to translate in increasing complex and combinatorial word list, and word classified in sentence

And this not really Korean anymore, because it clear you know very little, and his approach for any language