Knee position depends on length of thigh bone/lower leg/torso, can't really rely on that. As long as you sit back, it's ok. Video would be better of course.
If you want to get good at squats, you'll need to squat. Alternating exercises is not very good at the beginner's stage. Front squat technique is different, and has it's own issues (wrists, breathing, chest up, etc). I'd recommend staying on the squats for now, giving up on them because form is tricky isn't the way to go, just keep doing them you'll improve.



