I'm in the same boat. I usually make a large portion and freeze smaller portions for later. Also, veggie burgers are great and can be cooked separately.

That is a pretty reasonable approach. It can be pretty time consuming just finding a restaurant. You have to download menus, and sometimes check ingredients.

For me, convenience was a big thing because I'm hypoglycemic. Blood sugar would constantly drop without notice or predictability, so I wouldn't know I needed to prepare food until I wasn't really able. A lot of the foods I could quickly grab and eat in emergency weren't vegan. However, probably to do with my diet being healthier, my blood levels seem to be a lot more stable now. They used to drop several times a day, and be low most of the day. I only really prepared a meal maybe once a week or so, usually relying on my mom because I couldn't stay standing safely. Now I only drop significantly every few days, and it's much more gradual so I can deal with it, and I prepare and cook most days. Nothing fancy, variety's never been that important to me, but it means I'm not relying on cereal almost exclusively, or someone else to feed me because I literally couldn't get something from the cupboard.

I do the same, farmers market near my job... A go to for me is a chickpea salad, toss it in pita pocket, It’s two bucks to buy the whole package of pita bread and I just bring the rest home. I gave up fast food About five years ago… That was two years before I went vegetarian let alone Vegan. An accumulation of small changes gets big results... you go!