Well... if I owned it, I would start out by stripping the carpet out and sending it to a toxic waste facility...lol. Actually, though, if it has carpet or a mat, rip it out and buy a can of bedliner stuff, then roll it on the metal as your new floor covering. I would also add a drain plug hole or two in the low spots so it is easier to hose out. Replace the seat with a vinyl bench from a base model and you have a great hoseable interior for your 4x4 truck. As far as the rest of it goes, Ford makes an excellent full size truck. In a lot of ways, they were better built than Chevy models during the 90's. The weak point will probably be in the shift on the fly 4x4 system if it is so equipped. Most of them used a vacuum system to engage it which tends to be the weak spot. The fix will depend on what kind of front axle it has. If it is the typical 1/2 ton Ford split axle, it is not an easy thing to play with, but if it is a live axle, swapping in a replacement old tech axle would be a good move. Sorry I can't be of any real help, but my truck ownership experience is limited to the Nissan Frontier I have owned for the last 11 years (And will probably still own in another 11 years). For forums, try some generic 4x4 truck forums as they should have sections dedicated to specific models. I would also post some specific questions you may have on this forum. As popular as the F series is, there are bound to be many members that have experience with them.
Also, there is no need to apologize for owning any type of vehicle here. Remember, many of us have vehicles of different makes and origins on this site, so flaming is not usually tolerated over such a benign thing.