How to be unique in your design?

So i am beginner graphic designer I started doing it on canva basically I am social media manager so I have to design posts for brands and for my own personal brand.I am facing this problem like i am becoming very indecisive in selecting fonts colours etc like I overthink about if this is looking good or not I did basic course from YouTube. I got stuck every time on selecting even a minor details and then I got frustrated and kind of quit doing and designing posts and if I don't overthink about it and try to take decision to go with particular fonts colour and then upload it somehow after sometime I start to hate it and then ending up deleting the posts. Secondly, I am unable to build unique designs not unique like I don't know the art of making posts that build identity and when someone looks at my posts they should immediately know that yes this is that person's posts just like I can recognise others unique posts and style and taste and colours while my posts ended up looking like canva templates😭 which i just hate . I am struggling with this problem can anyone give me tips ir solution for this?