how do i stop being so awkward? help!

anytime a friend calls we usually just sit in silence, i dont know how to make conversation without sounding literally braindead

me: oh wow ha ha i like your pfp

friend: oh thanks

its alwaysb so awkward and i sound stupid. HEELPELEPL ENKHDGYJDHUJEUEYEHYEUHYEEUDkuf