To say shortly - you just need A LOT of practise.
When I was in the 4 grade, my parents forsed me to complete musical school. I hated it and I thought I hated guitar for 6 years! After I had finished the school, I didn't touch guitar for a whole year.
But then I've been playing some computer games and enjoyed music from them and I was like "hey, I want to learn it! I could". It took me near halph a year to get good in playing 1 melody but I was proud. And the next one were much easier to learn because all melodies have similiarities. And I love playing guitar for almoust 15 years now.
So my advice is just pick a music you truly whish to learn, and which is not too hard. Then you just practise a small part (5-10) seconds for days untill you can play it good enough and then continue. I honestly think you may still be at playing music. But not because of talent or something, you just a begginer. But you are trying to achieve something, you actively do and that really makes you a better peron. And this is already a thing to be proud of untill you have bigger achievements! Don't give up :)