You don't have a shortage of ideas because you don't have a lack of thoughts. Every day you witness the world around you, and you narrate your life inside your head.
Writing is merely learning to see, paying attention, listening and getting those thoughts out of your head and onto a page.
What shows up on the page maybe incoherent, disconnected, and disjointed. But if you carve, and whittle away, if you shovel a mountain of shit, you'll discover an ounce of gold. Work with that. Rinse, wash, and repeat. Eventually, you'll learn to see. Eventually, you'll learn to write.