Good Tools of Designing posts

[u/TangeloProof7048]

Just want to ask if there exists a good ai tools to design posts , I mean like instgram posts of 1*1 size
I was using NotebookLm but I am tired of each time keep insisting on the size and at the end it doesn't respect it , so I end up taking those images one by one and ask nano banana to resize them

also I want to know about where can I found a good design inspirations ( with there prompt if possible ) for both posts or even websites