Welcome
they are a little hard to master, but you'll do well after 'a while'. 'A while' depends on how much you ride. Ride a lot!
To soften the on/off throttle and clutch - maybe feather the clutch a bit.
It's not easy to know which mods you need until you get used to the bike - until then, just ride it and make notes about what
you think, like or dislike. Maybe these things can be fixed, maybe not - maybe it's worth it, maybe not. When/if you start to modify - only one mod at a time, so you'll be able to evaluate what the result is.
You'll most probably have a great time - good luck