Well, congrats!
Here's some tips. First, you don't need to use DBAN now... it sounds like you had an issue with use of Disk Management, and you have got past that and your single-parition SSD up and running. This is the foundation for either a clone install or a clean install.
Second, the modern MS operating systems from 7 up want a special "system reserved" partition that the install makes automatically if you do things correctly. I'm going to assume that your HDD is W7, and that the install came from HP. That means if you look at that drive with Disk Managment you'll see the HDD having a large partition, a small system reserved partition of about 100MB, and perhaps a system restore partition. If you use Acronis to capture an image from that HDD (onto your external USB attached spare hard drive?) then when you clone back with Acronis to the SSD from the captured image you'll have all partitions cloned onto the SSD and all will work fine simply by booting from the SSD. I always do a disk check from the system tools, both boxes checked, at this stage.
Third, the special system reserved partition has grown. W10 puts one on that is 500MB from a clean W10 install. If you do a clean install from a W7 Pro System Builder DVD you want to be careful at the beginning.... don't install directly onto the single NTFS partition you currently have. Early on in the process you'll have the option to delete that partition and the system will let you know that it may make a special system reserved partition. Let it do that..... and all else will go fine. Don't delete that system reserved partition later regardless of what you might read on the net from the old days.
You're about half way done.