First, welcome David.
A few thoughts to help you on your way. Yours is a fairly typical first post. You have a lot to learn, but you have the world's best support team right here. But we need accurate information from you to for us to give you the aswers you need.
Learn the correct terminology. For instance, what you initially referred to as a "midi" is actually an audio interface that has MIDI ports. Just " interface" is fine. We know what that is.
This isn't entirely directed to you, but also to the new users who may be reading this thread.
Yes, read the manual. It may be a pfd on the disc.
However, the LE manuals are infamous for including stuff that you do not have.
The tutorials for using soft synths refer to TTS-1, a general purpose GM synth that is not included with LE. This has led to much confusion and frustration. To an extent, Sound Center will work for the tutorials, but it bahaves differently, and you will have to wing it for a bit.
With the synth in focus, hit F1 to bring up a specific help file. That may not work, but it should.
Using the computer speakers will completely defeat the purpose of having the Quad Capture. Your laptop speakers are driven by the internal sound card. It is physically impossible to get the sound from the Quad( or any interface) to the laptop speakers. The sound has to go to to external speakers. Monitors would be ideal, but that unused home stereo in the attic would get you going.
Expect a somewhat vertical learning curve for a bit. Then the pieces start to fall into place, and it gets really fun.