My OH wanted to grow one thing: asparagus. So my only raised bed is for that. It takes a couple of years to really get going but we have more than we can eat fresh (I blanch and freeze some for use in quiches and soups). It gets cut back after it dies back Dec/Jan and a sack of rotted manure is spread and then we wait for the shoots to appear in spring. “Aparagus Watch” for the first spears is a thing here…
I have personally not found blackcurrents especially difficulty. I planted it in a bed that had been mulched, kept it watered (esp during warm dry spell, so I get mice big fruits), and I get tons of fruit. When I pick them in the summer, I also take off some of the big woody branches and harvest some of the fruit that way. In mid/late winter, I give it a another light pruning/tidy. Just a top dressing of good compost/mulch and it is good to go again. I get loads of fruit and lt pretty much takes care of itself. I’ve not had birds bother this like the redcurrants (caged), but you may have to see what your wildlife are like! And you can make homecade cassis, jams, and, my OH fav, homemade ribena (I freeze some so he can enjoy over the winter).
Gooseberries are great so long as you let them really ripen (many people pick them too early - hard and very green - and I think they are vile like that). I have an Invicta I got for £1 that give me plenty to use and share. Makes a nice crumble cake, too! Beware of spines though!
I would also really recc autumn rasperries. I tried summer ones but autumn raspberies (aug onward) are the best - no netting, lots of fruit but not all at once, and pruning is a doddle - when it dies down in Dec/Jan just cut it back to the ground. Joan J has been a star - great fruit and no prickles. Lovely to pick some to add warm from the garden to a pot of cold homemade yogurt. They are my absolute favourite fruit.
Blueberries are not hard to grow so long as the soils is acidic but I had no success with them in pots: I used some old pavers to line an ericaceous bed in-ground and they love it. Top with pine needle mulch (nice re-use of christmas trees) and give them rainwater, if possible, and that is it. In my garden they do need cage/netting from birds and a waspinator to discourage wasps (they sucked all the fruit dry one year, lol), but again, not a lot of care besides this. I laugh at the prices in the supermarket and they are so beautiful in the autumn.
I am currently growing seakale- started from seed and my plants are just a year old and I may give them one more year before I try to harvest. Very pretty leaves with lovely honey-scented flowers.
All the best of luck and let us know what you decide to grow and how you get on!