5 or 6 hours improvising ??? That certainly can be fun and help develop your instincts for improv, but you need a foundation of musical / technical knowledge to apply to your improvising. Since you're still a "beginner" (don't take that the wrong way - LOL ), I'd strongly suggest that you practice scales, chords, rhythyms, melodies, SONGS, a lot more than just improvising. When you have that foundation built, you'll understand how to use your knowledge / technique and your improvising should improve greatly.