What path do I take - Looking for History undergraduate, Anthropology Master

Hi, I'm a 20 year old from the South West, and I was hoping to take a route through History undergraduate to then doing a Anthropology/Anthropology adjacent Masters degree but I need some help figuring out how.
I want to be an Anthropologist as I find the study absolutely fascinating, but I desire the solidness of a History degree to fall back on if I never reached my goal (do tell me if this is silly)
I can't help but see History as a more solid degree that might get me a white collar or teaching work easier than an Anthropology degree would if things didn't work out. So is this History undergrad to Anthropology master and then hopefully researcher a good and practical idea?
As for the nitty gritty I'm a flunk so I lack level 3 qualifications. My A-Levels came to E,E,C from my incredible negligence, yet I desire to go to a university of some status to buff up the sometimes seemingly lacking power of a humanities degree and get me the right contacts for getting me into research.
So what's the best way to get my level 3, off the top of my head I'm thinking a foundation course some unis offer or access to HE. I must be honest working with a uni sounds far more appealing though.
Sorry if this in the wrong subforum btw and thank you for reading. I look forward to your responses