I was vegetarian for all of my life, only going vegan in the last few months or so. I feel you so hard with the whole idea of 'convenience', and to add to that, if everyone in your household is cooking a big meaty lasagne, it'll be hard for you to stick to your guns and boil some quinoa. Having said that, once you look into it, you'll discover that, due to growing dietary 'trends' such as gluten free and dairy free, the options for vegans has expanded incredibly from the way it was 5 or so years ago. I'll give you some ideas of the things I eat on a regular basis.
Baked beans on toast - vegan if you make sure the bread is vegan (which is usually is). Pasta with tomato sauce, or special dairy-free pesto - vegan if you check the labels! Sweet potato burgers, bean burgers, chickpea burgers, falafel - all vegan, which taste delicious with some avocado and tomato salsa, in white pita bread (vegan if from Sainsburys). Jacket potato, or baked sweet potato with hummus/guac - all vegan. Dairy-free butter on toast - vegan with the new brand 'Freedom' from Flora. Betty Crocker cake kits are almost always vegan too, so you can switch around the butter for Flora 'butter'/soy milk for milk, and find some substitutes for eggs (flax seeds work if you work out the prep techniques!). Lots of curries are vegan, Wagamamas do vegan dishes if you do your research and swap around some noodles, Pizza Express has a new fully vegan pizza, Pizza Hut has a gluten free base that's vegan, many burger places also sell marked vegan burgers.
Other 'accidentally vegan' products (which I basically live off): Oreos, (some kinds of) Pringles, Skittles/Starbursts (check the label though!), Fox's Party Rings, (some kinds of) Doritos, jelly tots, (some kinds of) dark chocolate, lots of Walkers crisps, Hula Hoops, borbons, chocolate chip hobnobs, (some kinds of) Digestive biscuits, Ritz crackers, peanut butter, Pot Noodle. Let me repeat that: Pot Noodle!
If you want to go vegan, which I would totally recommend (if you couldn't tell), then don't start it off by cutting out every bacon cob from your life because you'll give up after a 3 day streak by the smell of a shepherds' pie. However, if you're all for the vegan cause, which it sounds like you are, why not switch up products in your life for vegan ones; buy some dairy free butter and, now and again, use that on your bacon cob?
If OP or anyone else wants to talk to me about making the transition from meat to veggie, or from veggie to vegan, I'm more than happy to talk recipes, advice and easy convenient ways to eat healthily with little or no fuss!