Oka... so i know that Yngwie and Vai, atleast my favorite guitarists on this planet, uses lotta sweep picking, mostly yngiwe uses it more, to play those fast arpeggios and raking it on the fretboard...

ive seen many lessons online here n there about sweep picking, but i need some help,

i get how to sweep pick downwards... but how do u sweep picking upwards?
when i try sweeping upwards, my pick (0.95 Dunlop), just wont flow fluidly upward the 6 strings.. it stops at each string, making me get stuck in the strings and loose the sweeping feel

i get downward sweep but i dont get upward sweep
is this a common problem to newbie-sweep-pickers?
does every struggle with upward sweep picking when they first start?

and i also have this tendency to alternate pick when im sweeping up?
lol... somebody pleez drop a line, help me out