getting a bike that's comfy to be on is important. some sports bikes aren't as uncomfortable as they look, the worst bike ive had a go on was some harley looking thing with really high handlebars and far forward footrests, was almost unridable. though that one in the pic looks fine.
riding a bike isn't that dangerous in itself if you're a sensible rider, from my experience the danger is people in cars not paying attention. good luck!