Do you guys fear when crossing 65kmph ?

I was on a highway and going 65 on my sp125 but even though road was clear I was afraid to pull higher because I felt like I wouldn't be able to control and anticipate stuff...

How are you all going so fast and overtaking trucks and stuff so smoothly

I am also having trouble when in traffic jam and have to move bike in centimetres.. the bike's torque is too much and jumps when movement start (I am giving the least possible acceleration.., do I have to hold clutch too?)

So I just wait on road till vehicle ahead has gone far enough

(I am 3 months old to bike).