Yes, you are completly right we all gotta start somewhere. Even if it's too hard, too complicted. But that tutorial can't gt any easier. If it did it would probably leave out the most important hings. That always happens when a tutorial is made easier.
One way you CAN make your OWN meshes is using the object maker. Download Thierry's basic shape package. With those shapes you can make a variety of things like: Dog bed, tables, houses, stais (Just made a 2 story doghouse last night!) You can make lots of things. Allow your imagination to go wild! See what you can make. Learn alot by testing, and seeing the results. Don't give up. Just keep working! I am now a master at the object maker. But if you do make a awesome mesh using thierry's basic shapes make sure if you wanna have people download it. Give credit to Thierry in the Readme and in the post.