We get takeout a good amount ourselves but I do try to cook at least twice a week (sometimes more, also not including making salads or breakfast).
When I was single I would just cook some meat on a stovetop with some sautéed vegetables, cook frozen pizzas, or make basic sandwiches or burritos, but my wife (who I started dating in my mid 30s, btw) insists on cooked food when we don't do takeout, so over time we've built up some go-to recipes that aren't hard to make (although a bit time-consuming sometimes because of chopping veggies and slicing/browning chicken), maybe you'll find them useful.
For equipment, consider getting an instant pot for sure, and then maybe eventually a slow cooker, a deep square pan for the stove (that can hold a 3-4 servings of a meal), a nice sturdy spatula (or 3) like the Joseph Joseph Uni-Tool 5-in-1, and a vegetable chopper (to make dicing onions, green peppers, and celery super fast).
Chicken fajitas are pretty easy. Slice some onions and yellow peppers length-wise, cut chicken breasts into strips, mix together a few spices (can make a big batch of the spice mix ahead of time and store in another spice bottle to make it quicker next time).
Put the chicken and veggies in a casserole dish or sheet pan, drizzle oil and the spread out the spices, then bake it at 400 degrees for about 35 minutes, serve with tortillas, shredded cheese, salsa, and anything else you would put on them.
https://www.budgetbytes.com/oven-fajitas/
Chili is another one that you can just toss several ingredients into a slow cooker in the morning, and by evening it'll be ready for dinner and last a few days. Basically dump some cans of beans (rinse first), diced tomatoes, tomato sauce, and beef broth, then a diced onion, meat, chili powder and other spices, then maybe experiment a bit.
https://natashaskitchen.com/slow-cooker-chili-recipe/
A few other recipes we do fairly often that are hard to get wrong even if your measurements aren't exact:
https://emilybites.com/2015/10/spicy-taco-gnocchi-skillet.ht...
https://www.skinnytaste.com/lasagna-soup/
https://www.graceandgoodeats.com/skillet-enchilada-rice/
https://www.thisisnotdietfood.com/instant-pot-cheesy-buffalo...
https://www.eatingonadime.com/instant-pot-chicken-and-dumpli...
https://cafedelites.com/cajun-butter-steak-bites/ (we mix them in with some cooked egg noodles)
https://lexiscleankitchen.com/crock-pot-stuffed-pepper-soup/
Good luck! I was in a similar position a few years ago but now I'm glad I found some recipes we can cook that offer something different from what's easily accessible from nearby restaurants sometimes, to add a bit more variety.