This is not a spriting tutorial. It's just a guide how to code your own desktop pony using the program's built-in pony editor and is meant to be used with Desktop Ponies v1.50 and up.
Here are some downloads to go with it:
Tutorial Sprite Pack - contains all the sprites needed to recreate the tutorial pony.
"Tutorial Partner" pony - contains a simple desktop pony that can be used for the "interactions" tutorial.
That's a really broad field. If you can't tell me specifically what you have problems with, I can't help you.
And just to be clear: I have no problem with trying to help, but I'll not make your OC for you.
Well, there's really not much to it. If you want to edit a house, you just start the program, start the ponies, place a house, right click on it and click on the "Edit (name of house)" option. It will open a new window where you can adjust the house's options to your liking.
And if you want to create a new house, all you need to do is make a copy of one of the preexisting houses (the entire folder), replace the graphic and then edit the house.ini using any text editor so it has the proper name and points to the correct graphic file (the first two lines in the ini). Afterwards you can follow the above steps for editing the house.
I managed to figure out how to open the .7z file you sent me, and before opening it i wondered why you didn't simply give me a .ZIP file.
Then the program told me how much data was in the file and wow i see why now haha. The program I opened it with was put inside my program 86 file so going in there to open ti made me feel a bit smart
Alternatively, I guess you could send me the files you have so I can take a look at it. Maybe I can find out what's wrong then.