Hi Umair,
Pre usual you have got excellent direction from all on this forum, which is aligned with the operator manual. If this was a truck that was sold in via the dealer, they would have recived training and should eb able to help also.
If you ever need additional support, you can complete a quick technical support form at the bottom of the main combilift.com web site or direct link https://warranty.combilift.net/technical-support-form/. The form only asks for the minimal info so the team can quickly help you. There is no login required and no charge for this support. Anyone can request support for any age of truck.

Hope this helps