id enrol and get a place and then defer. it depends on the people. both my older sisters went to uni straight from high school and did really well. i went straight from high school when i shouldve taken some time to "grow up". if youre not sure what you want, keep your options open by getting a place at uni, then take some time off.
it took me three years to finish first year, first i was fulltime, then i was parttime, then i got a fulltime job and went to uni parttime (which sucks, you have zero spare time), then fulltime uni again, all with mediocre results. then i took a year off and since coming back ive done pretty well and am much more motivated towards study and stuff. i doubt i wouldve come back if i hadnt already enrolled though, thats why i reckon you should get a place and defer.
your parents are probably supporting you or making you pay minimal rent. believe me the support stops pretty quick once you're no longer at school/uni. if they're willing to support you through uni its not to be sneezed at. your dad probably just wants you out of the house. mine wants me out, but hes keeping his mouth shut till i finish