I have never been that good at improvisation. If i use just a Am pentatonic i can 't seem to find the right intervals to work with i usually end up with playing 2nds or something like that. I know all sorts of arpeggios and scales but i can never get anything good going. I'm not much of a chord player i don't know if that helps a lot with soloing improv or not. don't get me wrong i know what scales to use of certain keys and chords but not to the level i want to. I don't know where to start. I'm not totally new to theory but i don't understand keys and modes that well, or what intervals to use to get a melody going. what should i study