Sophia Thanks Sophia!
My improvising isn't blues or jazz style. I'm not sure what it is! It's probably a combination of classical, ragtime, and New Age because that's mostly what I played before I started improvising.
I started improvising about 4.5 years ago after a lifetime of playing from sheet music. My approach was to start with scales and chords. I played all the major and harmonic scales and went through all the chords in each one. Every day after playing that day's scale and chords I would improvise in that scale. I did that every day for about the first three years.
At this point I can somewhat comfortably improvise in any of the major scales using all the chords for that scale. I mess around with chromatic playing and with non-diatonic notes from time to time but most of the time I stick with scale tones. Even though I worked on all the harmonic minor scales I don't seem to want to use them as much so I'm not as good at the minors.
I use various left hand patterns, and also work quite a bit on improvising in both hands at the same time with no set pattern for either hand. It's tricky but slowly gets easier over time. Work in progress!
When I practice I usually sit down, play the first note, and let things develop from there. Playing one thing makes me think of something else so the playing evolves within a session. It's super fun!
I've started cycling through the scales again, not playing the scales themselves but making sure I'm covering all the major scales. I'm trying to avoid getting better in some scales than others. I have tons of areas for improvement: minor keys, modes, modulation, non-diatonic, variety of articulations, tempos, styles, etc. It's never-ending and immensely satisfying!
If I decide to tackle blues or jazz I think I will use a similar approach to enable playing those styles in all the scales. I think blues and jazz improvisation is awesome and I'm looking forward to hearing all of you blues students try it out. I think you will like it!