I learned to sew when I was a girl by making clothes for my dolls! Both my mother and grandmother thought it was a good way to get started becuase it is a good way to practice because it's quick. And since I wanted to make things for my dolls it was also an attractive project for me which kept my motivation going even when my frustration level was high. I am good at it now, but it can still be frustrating. For example, while it is easy eough to sew doll clothes aspects like armholes can still present problems and make things harder, especially when they are tiny.
And like everything there are easy and hard things about both.
To get started I would suggest trying to make a simple dress, you can find plenty of patterns online for these.
For me it really isn't fun unless it is harder. That is why I add sleeves and collars to most of my creations.
Unlike with other types of sewing, sewing for dolls is so much fun. And the best thing is the dolls will not judge you if you make a few mistakes.