Am new here, pls educate me,

my name is Jerry from Cotonou, republic of Benin. I recently downloaded Bitcoin core on my android phone by following the video clips of a man call Chris Dunn, I watched all his basic teaching clips from basic 1-5 but I am still having problems on using it for transaction. Pls what can I do, how will I use Bitcoin for daily transaction, how will I put money on my Bitcoin account from my country, or how will I mine Bitcoin. Thank you