How do I make online payments to the church. As instructed in a Disciplinary action given, in order to make myself worthy again to have my priesthood restored. Please advice. Thank you in advance.

Two separate issues here. In order to have your priesthood restored you need to work with your bishop/branch president. To make online donations for tithes and offerings you need to sign in using your LDS.org account and there is an option under your profile to make online donations. There is no such thing as paying to have your priesthood restored. If a local leader is suggesting that you need to contact the person above them (stake president or area seventy) and let them know about this violation of policy.

I was told to contact the main office in Utah

Or the bishop.

You should ask your stake president