I like mini mals.....I have one in my quiver and was my second board after starting on a 9'3"x23x3". For a smaller person the 7'6" mini mal I had could be a very good learning board; for my size a bigger board was needed in the early stages. I've since sold the 7'6" but added a 7' mini mal for smaller fat days, conditions that board works really well in. I have two longboards now and a big fungun, all of which can handle waist high to as big as I dare. For a big guy like me a longboard is the most versatile board in the rack and is a board a newbie can build a quiver around. But again, if I was a 110lb person at 5'2", WKKs guideline of 3 ft over the head would mean that an 8-81/2' mini mal board would be large enough to easily learn on and could serve as that quiver cornerstone.
I agree with OMS in that a newbie should learn how to navigate getting out back without duck diving. Reading the break, timing, paddle fitness, understanding the sets, learning to kick out over the back and paddle straight away to stay outside, learning to milk a ride to the channel for an easy return ticket to the lineup.....skills that should be learned rather than what is out there which is masses of people on undervolumed boards blowing waves because they bog out and are then caught inside and then paddle straight through the waves to get out back effectively turning themselves into kooky human speed bumps. I take pride in "dry hair" days when the waves are a decent size....able to paddle out back, ride, kick out and paddle all the while maintaining dry hair (or dry scalp in my case

) means I've got the wave wired to a degree and riding with control.