Hair extension advice?💇🏼‍♀️

I recently purchased a set of Bellami hair extension, but I cannot seem to figure out the right way to wear them. I want to be able to wear them straight and not just curled into my hair, they look normal from the front but from the back they look HORRIBLY UNBLENDED! I would never leave my house like this I feel embarrassed even posting this picture 😂 I was just trying them on and can’t figure out how fix this AND wear them with straight hair. does anyone here use clip in hair extensions and have any idea what I can do to fix this issue? I just want long beautiful hair 😩

Btw my hair isn’t straightened at the moment and I just brushed it ( i have naturally curly/wavy hair) so my hair looks pretty messy and dry from it right now!