Hard is a relative term. It took me almost 2 years to get to the level of comfort I have with the tools and the workflow.
The issue is the workflow. Importing models is relatively simple once you have the project and SDK set up and start your basic plane project. Setting up the SDK and then creating the project tutorial plane is also not straight-forward and will take several sessions of AI coding assistant to help. I recommend using Microsoft Copilot as it has access to most of the MSFS2020 SDK and can reduce the learning curve and even generate basic plane templates.
A good portion of the work is creating the flight model correctly and realistic. You can have your VF model imported but it may fly like a bi-plane if you stick to tutorial craft.
None of the flight surfaces will move or animate with your controls until you create the animations and bind them to the planes XML configurations, which is a whole SDK to learn.
I am considering making a Macross builder/boilerplate craft template for purchase that will have some of the hard-work already done in terms of the flight model, cameras, lighting, animation bindings, some transformation sequence placeholders. I also will be starting a patreon where I will make some craft available.