[kach22i]

Then get started.

If you just want to get your feet wet, the conveyor belt chin spoiler is a weekend project if you get all your supplies together the weekend before. There is a link in my signature for some tips on how to do this. Lawn edging is fine for a year or two or until someone backs into it with their bumper and should be considered temporary.

The roof deflector fairing is at least a two week project unless you can repurpose a found item and make do.

The most beneficial item is the longest most time consuming and challenging, the rear box cavity as it may have moving parts. Maybe there is something on the market already or a damaged semi-truck unit from a junk yard can be modified. Point is, it's just big and requires some engineering.

I would proceed in the order above and knock out the other items along the way.