growing cabbage, onions, beets.?

I’ve been given some fresh cabbage, onion and beet seeds.

[I’ve grown other vegetables {tomatoes, cucumbers, rhubarb, strawberry, mint, sorrel (schav)} before, but this is my first time planning to try these.]

I’ve already read online about how long they need to be started before transplanting, etc., how far apart, etc.

How do the seeds have to be prepared? Should I dry them or is it safe to start them fresh the way they are? I have loose, very moist (lakeshore) soil with a high humus content.