You'll need to improvise around the chord symbols. That may be completely new for you.
WHAT IS THE KEY
Jazz music scripts do not always tell you which key the piece is playing in – it may be major or minor.
Look at the last chord of all – that’s the one it will all resolve to, so that is the fundamental key. But getting there will take you through several key changes.
THE SHAPE OF THE SONG
Look at the shape of the piece. AABA or ABAC is it or some other weirdo? Is it 12 bars/16 bars/32 bars or longer - your ear feels the music in 4 or 8 bar sequences. Don’t be fooled by an odd shape. (Watermelon Man sounds and feels like a simple blues, but it is 16 bars, not 12)
Have a pattern, a plan in mind before you start. Look for the major keys, when they change. Look for the dominant 7 chords –
they’ll tell you which major you are in at that time. Don’t be fooled into thinking that a minor chord is a Dorian, (2nd mode) of the major. It could be the third mode, or the sixth. Rely on the dominant 7 chord to tell you which key you are in. Even a maj chord symbol might be just a 4th chord in another scale and can fool you. Sometimes an odd chord is indicated, but this might just be linked to a melody note and the basic key has not changed.
LICKS, PATTERNS, SHAPES AND RIFFS
Put in some of your favourite licks over the harmonies. Find things which work well within your technical range. Try out the same lick in different parts of the solo, change the phrasing. Try and create a shape for the solo
Get Band in a Box, put the chords in, and you’ll have a built in backing track to play against.