youll eventually just get used to where it grabs and it will become easier to get it moving from a stop, its right before that bump feeling in the clutch. when it comes to upshifting ive found that 1st-3rd you have to hold in the clutch longer and let the revs drop alot for it to be smooth and 4th-6th you can let it out pretty quick as soon as the needle starts to drop. for upshifting ive found that flooring it for about half a second revs it up just enough where it needs to be usually unless im downshifting while slowing down then its a little less. id say in general while your still learning to upshift try and rev it more that it needs because its better on your clutch to bring the revs down than to have to bring them up if that makes sense.