E-commerce business shuru korte chaile ki ki jante hobe?

Assalamu Alaikum bhailog! Ami recently e-commerce niye seriously chinta korchi, biye-shaadi hoye gese, family er jonno ekta stable income source dorkar. Dhaka te thaki, office job er pasapashi kichu ekta korte chai. Daraz, Facebook page, naaki nijei website banabo - konta theke shuru kora bhalo hobe bujhte parchi na 😅 bKash ar Nagad integration, delivery system, product sourcing - sob kichu ekbare notun amar kache. Apnader moddhe keu ki e-commerce korchen? Shuru te investment kemon lagse, ar profit margin ta realistically kemon? Specially Dhaka er bhitore delivery er jonno Pathao naaki Paperfly use korle bhalo hobe? Inshallah ektu guideline dile khub upokrito hobo, experienced bhaidera ektu help koren please.