You will be fine - really. We were all where you are and if we can all do it - you can too!
You should have received the software code so you don't have to use the demo version. Check your spam if you didn't because sometimes it goes there.
There are excellent videos on the forum and on YouTube to get you acquainted with the software and lots of options for support if you need it.
Just take it slow and you will really be fine - and amazed at all that the software can do and how well it works with the Silver Bullet. It will all come together, one step at a time!