Hi Robin, this is Peggy. Yes we all need storage and this is a great way to add it to our home. Here are some plans I hope will help you. Good luck DIY Upholstered Storage Ottoman - How to Build an Ottoman - Full ...
How to build an ottoman – Start by building the short sides. Attach the long aprons with pocket holes and wood glue to create the box. Attach a 1/4″ plywood bottom for the storage frame using wood glue and finish nails. This is also a good time to paint the feet to match your furniture.
Here is how to build a fairly simple one: https://www.homedepot.com/c/how_to_build_a_storage_ottoman_HT_PG_SO