Welcome from Devon
I'm not sure from your post whether you intend B&Bing or backpacking. Either is perfectly possible on the SWCP between Minehead and Lands End - I've done both.
It is pretty much a tourist area, though few tourists venture far from habitation so the path itself is still pleasant to walk, so plenty of options for accommodation both B&B and camp sites.
Wild camping on the cliff tops outside the agricultural land is no problem though technically not legal, of course.
No need to carry lots of food as you can pick up both food and drink as you go along.
Enjoy - I certainly did