In this study I have 'mapped out' the chart with different solo ideas. This can be a helpful way of organising your ideas and provide focus within your solo.
Of course, creativity is very important, but improvisation is also about having resources - even a plan - as much as it is about spontaneity. The truth is, even the greatest of players (to a lesser or greater extent) will have 'solutions' for various conundrums that arise in improvising over the changes. You only have to listen to realise that.
The left hand here is simpler and this allows you to focus more intently on working on your solo ideas. In the long run, you want to think about using the rhythmic work from the second study to enliven your solo in the same way you tried to enliven the melody.