Exercise bikes...
You know, the kind we all buy with great intentions, and soon place a potted plant on the seat. We don't want you to buy one from us!
Improved marketing requires serious focus, and a budgeted amount of money and effort.
It won't go as well early as you wish. There is a learning curve, almost for sure. A multi-month commitment is key.
Keeping it going requires building infrastructure having the kind of discipline that assures continuation.
It is not easy, but few worthwhile things are easy; and efficient, effective, affordable marketing is a worthy goal.