I recommend the Merzy The First Slim Gel Eyeliner GS3 Bronze Opal.

I love this product because it is slim, so it doesn't create a thick line when drawing!! Since you can draw thin lines, it is great for beginners to use. Black doesn't suit my eye shape, so I usually use brown shades; the Bronze Opal isn't too bright, so it is a good color for daily use. It is also affordable, so it lasts longer than I expected, making it a great value product! There are various colors available, so try purchasing the one that suits you best~~