Dude you can do it. SinnerSaint  is right you are being to self critical. Work on your modeling and stop driving your self crazy with  perfect topology.  I mean learn about good topology and try to work it in there but  don't stress over it. You will get better. As far as tuts go don't worry about whether you built an entire complex model but what kind of tools did you learn to use. As you practice you will acquire more of these skills to put in your modelling tool box. Open up Blender and just look through the tools and play around with them. Search YouTube for tuts on these tools and then try to  use the tool to build or alter something simple. The most important thing is just enjoy what you are doing. If you don't you wont stick with it. Besides It's not worth driving your self crazy over. Start a project on something you would like to build and start a thread in the Blender forum or the modeling forum or both. the folks here will help you out.

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"The true sign of intelligence is not knowledge but imagination".

Albert Einstein