I have been trying for almost a year now, Orchidea - the big problem has been getting help when I have been stuck - which was often. A lot of the tuts, assume you know something about what they are talking about - but if you don't then it is complete double dutch.
Liz has PSP 7 too, she and I have been trying to learn together.
Those pics of yours are just beautiful 'O'. (er do I call you Babe, now then?)
The problem I have, is finding ones which will be suitable.
The one I did with the carousel horse was complete with that bubble - I just put the horse on it.
You say you are not artistic - I don't believe that for one minute.