you can do it by yourself. i can give some references that may help you. there are some steps of learning to ride bicycle which i get from internet.
Get hold of a bike whose seat is at crotch level when you arestanding flat footed
Take off the pedals
Sit on the bike and launch yourself with your feet and glide.Try to glide as far as you can. Do this for a couple of hours (or evendays), or until you feel very solid about the balancing thing. This isthe hardest part of riding.
Now glide while pantomiming pedaling. Again, do this until you feel solid.
Put the pedals back on the bike.
Practice launching as you did before, but this time rest your feet on the pedals.
Now try turning the pedals.
You will have more fun if you recruit someone to watch over you.