Book an appointment with a loans officer at your bank and ask them what steps you need to take in order to qualify for a mortgage in the future. Likely they will tell you the first thing to do is try and establish a new (good) history with some form of credit. This may mean applying for a secured credit card or some other form of secured debt. After a year or two of making all of your required payments you will create the good history you’ll require. It just takes time…