OK, my 2 cents;
Buy a cheapie bike of any displacement. When starting out, the bike is irrelevant. Learning how to read the road surface & anticipate the actions of other drivers is what will make riding fun (and keep you alive). Buy the bike of your dreams after you gain that confidence and you'll never look back!
It can also be more fun to ride a small bike fast than a big bike slow.
Good luck and have fun.
