don't be nervous about starting a piece of 'art' - whats the worse that can happen ? the world explodes, the zombies appear... No, !
Jump in and pick something you like, it could be a skull, a flower, a particular model of car or bike and if you aren't confident enough to tackle the whole picture, just pick an interesting section and work on that.
Its all positive once you start, you find out just how much control you have, and how to apply the techniques you've been practicing with the dots and daggers. and then you have a starting point, once you're done, date it and store it, no matter how bad you think it is.
in a few months once you've done a few more pieces, pull it out and look at it and compare it. you'll be amazed at how much you've improved.
Above all you realise how much fun it is. yes, the learning curve can be a pain but I even find that fun !