Hi and welcome! You have picked a GREAT forum to join! I am a new rider too and have had many questions.....everyone here is super helpful and so nice! As for your gear and your bike....
A Ninja 250 is a great bike for any travel. In town, highway, leisure....I have done my research, let me tell you! It also seems to fit your frame too. I think that dealerships will tell you whatever they can to sucker that money outta ya!
Now...gear just needs to be well padded and comfortable. As long as you have that...you are GOLDEN!
WeLcOmE to NiNjEtTe!!!!!!