bro, even if you reach him, you couldn't move. you would just be at a standstill as shown in the jjk manga and the vsb page. to actually do anything within his infinity, you would need infinite speed to counter the infinite space between goku and gojo. it doesn't matter the range, if it doesn't have infinite speed, it simply will stand there. ki is, just like cursed energy... well, energy. his DE is 4D by standard, so ki couldn't channel through that metaphysical space. also, gojo's infinity is amplified and perfected because of his six eyes, so his infinity could also be 4D, making ki also useless.
also, goku would be mindfucked by the DE, so that wouldn't work anyway.