Becky, don't get all tangled up about making your trailer "perfect." It only needs to be perfect for you. If you're expecting to take a 20+ year old trailer and make it look brand new, you may be sadly disappointed.
It's a travel trailer! You'll sleep dry/warm and be able to stand up and put your pants on in the morning. Honestly, everything else is "optional." If you can make coffee in the morning without building a campfire, you are miles ahead of folks that are tenters!
Don't get disappointed if your trailer doesn't meet the expectations of all the pictures and modifications others are doing. It's really all about you! If you don't like the "hole" you see when you lay down at night... on the ceiling... make a decal that says "Smile, you're camping and making a Memory" over the patch. Turn out the light
and go to sleep. No one says you have to "fix" or make your trailer perfect in the first weeks you own it.