It doesn't matter whether you are single or double. It is important to see what you like and what conditions permit. As you said, it should be quite natural for you to do double eyelids.
I have a single eyelid, but my eyes are not small I used to want to make double eyelids (because I was lying down and my eyes looked up), but later my family disagreed, saying that what my parents made for me was the best.
Now that I am old, I don't think it will be too good to recover, so I give up completely.
If you want to do it, the sooner the better!
I wish Yuemei ~