Obviously it's possible but not with those subjects. Especially chemistry.
I just finished my A2's, one of them being history and self teaching yourself that with absolutely No feedback from an actual a level history teacher, is not possible. It's one of the hard A levels you need guidance for. It's difficult to have all the info in the course book + Internet. That A level also includes one coursework unit which yes, it's independent research + independent essay but it has to include a question that has been approved by the exam board, previously sent over to them by the teacher. The coursework also has to be assessed and marked once by the teacher before being sent to the exam board. Self teaching that subject just won't work.
You're better off going to an actual sixth form/college as A levels are nothing like GCSEs. Much more work and a humongous difference in the level of education. You don't necessarily always come across bad teachers but even when you do, it's likely that the other ones are not bad.
Edit: also if you hate exams and being in a class room, A levels might not be for you as both history and English are both essay based. And both include essays writing in exams.
You might be better off doing level 3 Btec which is accepted by most unis for most of the courses they offer.