Can I grow Hosta from seed?
Yes. You can grow hosta fairly easily from seed. Ventricosa is one that will readily provide volunteers year after year.
However, if you are interested in growing a particular variety, most Hostas do not come true from seed. From any hosta seeds you plant you will get a mix of solid colored seedlings. Most will be green, some will possibly be various shades of gold and possibly some blue.
If you are interested in getting multi-colored seedlings you need to look into getting a streaked plant to use as a pod parent. That will not guarantee streaked seedlings but it will increase the chances tat you will get one.