If you drop a plum line from the front axle the tire/roller contact patch should be IN FRONT OF (edit!) that point.
If it is behind the the plum line (eg between the fork and BB) the bike is very hard to steer.
Get a stool or phone book to help you step up onto the bike and start in a a low gear.

Keep your head up as much as you can. A lot of your balance comes from visual references and looking down means you don't have any.