In which case, I would encourage you to look into engineering. I hold a certain bias against doing unnecessary degrees (if you're going for research, then it's a different matter).
Be it Access or A Levels, you should really look at what the entry requirements are for the specific degree that you want to do before applying. Doing random qualifications may mean you don't have the suitable qualifications you need and resulting you going back to do more qualifications. It gets expensive and becomes time consuming.
In terms of A Level options, if you want something that would encompass engineering, IT, and business, I would look at A Levels in Physics and Maths. Business degrees don't have any specific subjects unless you want to go and study something with quite a bit of financial mathematics (in which case you need Maths). IT degrees generally only ask for Maths if they're picky, otherwise they accept any subjects (Computer Science A Level won't really help that much despite being a more relevant subject). Engineering generally involves maths, so it's more or less essential; however, it depends on the type of engineering that you would do - most would require physics, but you can have chemical engineering that involves chemistry and bioengineering that involves biology. If you want to play it safe do 3 sciences + Maths, but that's overkill. If you know the general direction is in engineering but wouldn't involve chemistry or biology, Maths + Physics + whatever your third subject would be.
In terms of Access courses, I would focus on doing an engineering Access course where you have 15 credits in Maths and 15 in Physics/Engineering. The engineering Access course should allow you to go into IT degrees, if the particular course and university accept Access courses (contact the administrator/admissions of the Computer department, not general admissions, to double check before enrolling onto the course).
If you intend to work in the tech industry as opposed to going into academic research, can I suggest professional certifications for the specific role that you want to do in IT as opposed to a degree? If you want to go into business, you can do professional business qualifications and try to get the relevant experience.
Engineering is the only discipline where it would make sense to go to university for if you don't want to go into academia.
Do note that you can go into any area of business with any or no degree. You can also go into IT with any or no degree. You cannot go into a specific area of engineering (or progress towards a senior role) without an appropriate degree.
If you want to check which qualifications you would need, I would recommend checking National Careers Service (
https://nationalcareers.service.gov.uk/explore-careers), Prospects (
https://www.prospects.ac.uk/job-profiles), or Bright Network (
https://www.brightnetwork.co.uk/job-profiles/). (I prefer National Careers Service, since it's more comprehensive.)