I'm gonna read through the page, thank you. What's important for me now, is to learn how to create solo's which fits the chords in a song. I also want to learn when making a harmony, how you can know which note harmonies with another. I want to be able in the future to say: "Here we have an F, then to make it a harmony, play along with a C#" - right now I have no idea whether this example is a true statement, but I just wanted to explain what I meant.

When I sit down playing along with records, I can sort of make up solo's - improvise - and it sounds good. However I almost all the time play in the pentatonic minor scale, so it gets a little monotonous.

Yes, my ears are working very well, but I think it'll be an advantage knowing some theory, because then there are a lot of more possibilities and variations, isn't it?
Stupid question that last one.