Greg Clinkingbeard
Commercial User
No I realize that nearly all of these songs would be better with a vocalist.............................................
That, more than anything exposes your lack of experience.
My thoughts in my typical random delivery.

Without a chording instrument, you have to REALLY have hour s**t together. Your walking lines must outline the harmony very clearly.
Choose a strong horn player and then agree on 25 tunes that you both know well. That's melody, changes and the ability to solo well over them. Allowing for 6-10 minutes per tune, that's anywhere between 5 and 8 tunes in a 45 minute set. That should give you enough material for two three hour gigs and allow some variety. Tune choice is up to you based on your tastes and abilities.
In putting together a set list, be careful of playing tunes in the same key and style. Two swing tunes in F back to back is not cool. Break it up with some bossas like Autumn Leaves and The Shadow of Your Smile. Include some blues tunes. If you can play the blues in all keys and the horn player knows the heads, that's 2-3 tunes and your learning curve is much easier. Just keep it interesting.
I totally agree with the comments about playing with more experienced cats. There is nothing better for growth than a kick in the pants.
It's hard for anyone on a forum such as this to give you the any significant feedback because we don't really know your current ability or potential but really learn the tunes. If you need to look at a chart, fine but use it as a reminder or crutch rather than staring at it the whole time. I play 2-3 gigs weekly and need to see a chart for a few tunes but definately play better when I really know the tune.
There is no better experience than that gotten through failure. Go play some gigs and learn the ropes. Respect the music and the musicians you play with, the audience, and the people hiring you. Know your limits. Also remember that in many cities, many top players with decades of experience are struggling for work. Be careful not to take their gigs so seek venues that currently don't currently hire jazz groups. If you play well and respect those you meet you will be fine.
Good luck to you.
.