Social media marketing shikhar jonno best platform konta hobe?

Assalamualaikum bhailog, ami Barishal theke bolchi. Ekta important question chilo apnader kache. Ami IT support e kaj kori, kintu side income er jonno social media marketing shikhte chai. Apnara bolben ki Facebook, Instagram naki LinkedIn - konta diye shuru korle valo hobe Bangladesh er market er jonno? Ar free te shikhte gele YouTube e kono valo Bangla channel ache ki? Budget ektu tight tai paid course er option nai ekhon. Inshallah valo kichu shikhe freelancing start korte chai. Apnader experience share korle upokrito hotam bhai.