depends how confident you are. If it doesn't work you could lose your motivation. Do you know anyone who could give you some guidance?
I remember the first thing I made at school in needlework was an apron

I sewed and knitted most of my children's clothes when they were young and even made husband a pair of summer trousers once.
Do you know anyone with a young child. Children's clothes are a good starting point because they are small, but you wouldn't want it so small as to be too fiddly.
I wish I still had a sewing machine