Whenever you register on Instantgo, you can automatically start offering products and services to other users. You don't need to do something special for it. Simply make sure to access your Settings in your Profile page and add your payment method(s) in order to request payments from other users. Also make sure to add all the necessary information in your profile. Remember that the more complete your profile is, the more chance you have for people to find and contact you on the platform.
Then start adding the products and services you would like to offer to other users. In order to do that, simply visit your profile, click on edit profile and add products and/or services to your profile. You can also indicate the price you usually charge per hour to provide an indication to users.