@Whiskyfromsmallglasses sorry to hear that you have found out you can't eat gluten , it can be a bit of a pain in the arse but as much as it can seem overwhelming to begin with you do get used to it. (Also sorry to hear about your dad ).
You do get used to reading labels and deciphering what is okay from a point of making you ill and what is worth it taste wise.
I also like Promise bread (the multi grain) but I know from a thread on here that not everyone does so its personal taste. There are other good bread product options too. I like the schar frozen rolls (just defrosted naturally - not oven baked or microwaved), wharburtons crumpets and English Muffins. Be Free oven bake baguettes. White Rabbit pizzas. Tesco ginger biscuits. Square brioche rolls (wharbutons maybe?) for burgers etc as they don't fall apart. Old El paso small tortillas. You'll find the things you like.
I prefer to bake my own cakes and biscuits as the shop bought ones can be hit or miss (I'm also lactose intolerant though so maybe some that have dairy in are better).
Doves Gf flour is good. Self raising for cakes, plain for pastry. It can take time to learn how to bake and cook with gf flour as it doesn't work in the same way. Home made chappatis/flatbreads are easy.
Oh! And pasta. There is a relatively new (to me anyway) make out in the shops. Italian in a white-ish packet. I can't remember the name. They do spaghetti and rigatoni as well as the oblivatory penne that you will get at restuarants. If I can't get that make, then my go to is Tesco Gf pasta - penne, macaroni, spirals - not the spaghetti so much as it collapse. The gf (and vegan) filled pasta from Tesco Wicked range is delicious.
Keep an eye out for 'hidden' gluten in ingredients. No malt or barley. Frozen chips when you eat out - ask them if they have a wheat coating. Or if they are cooked in the same oil as wheat food - you may be okay with this, you may not. I believe some rinds on cheese can have wheat. Crisps, ready meals, sweets, desserts, burgers, sausages etc, things you wouldn't think might have gluten may have it in to bulk up so read everything, even if it seems obvious it won't.
Some people (like me) enjoy the products that mimic gluteny/wheaty products but be aware that they are often much more calorie laden (I'm looking at you M&S iced buns! ) and/or much more UPF so I try to keep them to a minimum. But sometimes I just want a bit of toast! Some people avoid them as much as possible either because of the ingredients or taste. You might find that they taste awful to begin with but you get used to them a bit more or that you end up relying on them less and less.
Having said that they aren't always the best alternatives, things are a million times better than they were 20 years ago. And I would have hated to have had to do it even further back than that as the choices were dire.
The free from section of supermarkets will be your friend and you will get ridiculously excited when you go somewhere and they have something new to you on the menu or shelf that you haven't been able to find for years.
Good luck. There are a good few threads over the years on this if you search them up.