I would avoid the brambles. Instead of blackberries, how about a Gerardi Mulberry? It is a shrub form that gets to be 6-10' tall and is well-behaved. Instead of thorny and caned raspberries--one of my favorite fruits, but didn't plant because of the issues, how about Bushel and Berry 'Raspberry Shortcake'--these get to be maybe 3' mounds. They do send runners, but they are thornless and very easy to maintain and are attractive. You get more plants, so you don't have to start with a lot.
I have 40 blueberries, which is way too many! They have been very fruitful over the years, so I have lots of friends come pick and take what they harvest! A few years ago, I added pelletized sulfur and they seemed to really appreciate that.
I did use my front yard to plant my food forest because it has the best southern exposure. I mainly planted the taller things (trees) on the northern edges, with things descending in height toward the south. Near the sidewalk, I planted perennials, herbs and a row of Regent serviceberries as a border so people and dogs couldn't easily enter. I did put an arbor in the middle of the 120' length so that people could come into the yard that way, and I've found that that break was extremely helpful--especially for me when I'm working out there!
I have cherries and persimmons on the northern side, but interspersed among other plants, I have paw paws, dwarf apples, figs, then lots of bush-type plants: currants, rhubarb, honeyberry, etc. and I've used strawberries as my groundcover. Behind the serviceberry shrubs near the front, I planted asparagus. It's not the most attractive plant when in its spear stage, and I wanted the serviceberry to act as a support for the fern stage. That has worked beautifully, although the ferns are up to 8' tall, which I wasn't expecting! I planted pink climbing roses on the arbor so that it would be recognizable to most.
Some of the more unruly things are out back. Elderberry, which often tries to creep out into the lawn...Heartnuts, which could perhaps cause a painful bonk on the head to passersby on the sidewalk, More paw paws and persimmons....I have to say that all of the gardens are neat and tidy looking and change throughout the year with the addition of bulbs and mushrooms, along with bloom times, fruit and leaf color and shape.
The front needed to be a well-behaved garden, as I don't like to be "on display" when out working on the garden. It really does not require much input from me at all. The perennials also serve a purpose: pollinator attractor like yarrow or borage that self-seeds, pest-confusers like garlic and daffodils, native color like asters and penstemon , medicine like many herbs, nitrogen fixers...you get the idea.
The majority of time is in harvesting and prepping the food. It is a surprising amount of time each day. Just strawberries alone require about 3+ hours a day l filled my freezer with strawberries and blueberries. I've made rhubarb roll-ups along with currant roll-ups in the dehydrator, and have freeze dried many many gallons of strawberries and cooked blueberries, mushrooms, whatever. You will want to get at least one of these: a dehydrator, extra freezer, canning equipment or a freeze-dryer. Last night, as I was deciding between canned peaches or applesauce, I had to smile, reflecting back on doing the work so that I could enjoy such wonders!