Is there any way to make the journey for user interesting?
What do you mean by this exactly? Should a form be interesting? Or should it be simple, easy, and useful? Have your users requested the form be more interesting?
Do you have a link to your form, or a screenshot?
Accordions should only be used as a last resort. For multi-part forms it is better to have multiple screens with the steps shown at the top (e.g. 2 of 10) and the ability to move back and forth through the form; or use progressive disclosure, keep it all on one page, and label each section (e.g. 1 of 5).
Which solution you use depends on the length of form - an hour to fill in sounds pretty long so multi-page might be best.
A great addition would be to enable users to save their progress with the form, so they can come back later to finish it.