Congratulations on your achievement! Long solo rides can be very relaxing. It's also quite normal to get tired on a 200+ mile trip, especially if it's your first time and you haven't got the necessary specific fitness. Keep riding and things will get better.
As for cornering improvement, I can tell you what works for me. Every time I get a new bike I spend some time on an empty parking lot with the new bike and work my way through riding fundamentals - stop and go, figure 8s, slaloms, swerving, emergency braking. I find that it builds up confidence as it allows me to understand the limits of my bike and how it's going to behave in a specific situation.
I'm not trying to self-promote but if you are wondering what that looks like - practicing on your own, here is a short video I made a few seasons ago talking about staying alive on a bike while endlessly turning slaloms on my old Tiger 1050.
https://youtu.be/fVf4I8oRZ-Y
And as usually I think every post should have a pic, me slowly narrowing the U-turn radius while breaking in a new set of tires (also on the Tiger)
![[Image: 02ebd783d631c3adbfbdeb1629c54a02.png]](https://cb1100forum.net/forum/uploads/imp/202108/02ebd783d631c3adbfbdeb1629c54a02.png)
'14 CB1100 STD 5 speed