Can someone give me some advice about motorcycles/scooters?

I really have had it with L.A. traffic. If you haven’t read it in the news, 4 million people now call Los Angeles home. That means more traffic.

I am 85% sold on getting a two wheeled vehicle, but I have a few questions. Can you help me with this?

What’s is safer, a motorcycle or a scooter that can go on the freeway? In CA, 2 wheeled vehicles drive between cars so I need something that is agile.

If I went for a motorcycle which is the best for a beginner? I would mostly drive it during my commute so I can’t see myself driving more than 35–40 mph.

I don’t want a motorcycle that requires you to lean over. I’d like to be able to sit up straight. Is this a normal motorcycle or a road bike? I did a little research and seems like there are many kinds of motorcycles.

I see a lot of motorcycles that have a wider back tire. Is that for safety?

Can you help me out? What type of motorcycle or scooter would be best for me?