when i first smoked i used to get super paranoid too!
The laziness depends on the strain of weed for me, some stuff is good for an 'UP' sorta high, others is good for the 'melt into the couch' kinda hight.
Its weird like if I"m in a mood where I just sense something is not right... then I will definitely not smoke cause full blown paranoia.
If it schwag then yeah laziness is bound to happen, for me anyway.
S O gets hers from some undergrad kids from hawaii, who say it is from kuai. Cannot be anymore kind, so yeah, high and not stupor stoned just wanna crash and eat type shit.