Phonix,
I too, once was unable to make journeys. It took me quite some time. It is hard when you first start out, however it will become easier. All of the advice you have received is rather soild.
None of us are the same, in this. I for one only recently started using a (small )drum. Which seems to be much of a supreme to many. In fact, most my journeys are done while I am dancing.
While I don't know your heritage, if you can find a means to be closer to some of there traditional meetings it may help also.
If you are unable, a means that was taught to me was to invison a road, every little detail. How it feels,looks,smells tastes, as you walk down it in you mind. Walk with no purpose at first until it comes naturally, then set a course.