When I first came upon furry fandom I had some drawing experience, but even then it took me good two years to fledged out a design I liked.
My first character was a Dutch Angel Dragon but it never felt like sona, but I still use its name "Kaelygon" in most places.
It took quite a few character concepts until I ended up with my current one.
So you don't have to have a sona right now, if you have hard deciding give it some time, explore other's art and so on.
I had general idea what features I liked and that I wanted it to be a simple design but putting all of those together took quite some time. Here's an imgur album of the character Tiena progression: https://imgur.com/a/HgYIiX1
I am happy that I took my time playing with various concepts, so far I have only changed the feet to more dragon like from the original design and it really feels like a character that I has stuck around with me all of these years.