So...I am not a dietician. But I did work for a nutrition company for a while.
That 100 gr. number is highly debatable. It depends on your goals, your age, your weight. Here's one calculator: https://www.calculator.net/protein-calculator.html
Some people will say the recommendations are too low. Others will argue they are too high! (You know...just like anything in the world of nutrition. There are a million "expert" opinions.) Whatever.
The main things to keep in mind is that if you are lifting weights and/or want to gain or maintain muscle, you will have higher protein needs than someone who is relatively sedentary. If you are trying to lose weight, a higher protein diet is often good, too, because protein helps you feel full for longer.
Also, you need to eat protein at each meal -- it's no good loading it all into one meal because your body can't metabolize it all in that case.
My step daughter is a vegan. She meets her protein needs with legumes (a lot of chickpeas, lentils, peanut butter), beans, soy products (soy milk, tofu, tempeh), and by ensuring she also eats complex carbohydrates with her protein. She is a dancer, so her metabolism is high and she needs a lot of food.
My stepson is vegetarian (actually, pescatarian) so when he is with us, so are we. It's pretty easy to get enough protein if you eat dairy and eggs and fish. You may need extra iron, though.
Mr. Suz and I are not vegan or vegetarian. But we eat meat only about once a week. We eat at least one or two vegan meals a week and a couple of vegetarian meals, as a rule. With fish about 3 times a week, poultry once or twice, and meat once, though a bit more often in winter. (I know that sounds like a lot of meals but I'm talking 3 meals a day, so...)
If you want to add vegan protein, I'd look for a cookbook that offers you a few simple tofu recipes to try -- that will really help. This one is pretty handy: https://www.chapters.indigo.ca.....SmartShop_
We also like Veganomicon for vegan recipes. https://www.amazon.ca/Veganomi.....1_1?hvadid
I'm a great one to talk here. I have to admit that I'm pretty sure I'm not getting as much protein as I should, right now. I try, but I often miss breakfast, which is my big mistake.
Anyway...to simplify your life, think about. a palm-sized serving of any protein source. At each meal. If you eat that, at minimum, you are probably getting enough. Assuming you eat three meals a day, that is.
If it feels overwhelming, how about working meal by meal? Come up with a few easy options for breakfast, first. If you are eating dairy, cottage cheese is brilliant. An egg white omelet. Steel cut oats soaked overnight in kefir with berries (you don't have to cook the oatmeal.) Add some nuts and seeds for extra protein. Peanut butter on sprouted grain toast with banana and a smoothie made with soy milk or vegan protein powder -- if you can find one you like.
For lunch -- salad with baked or broiled tofu, or hummus with veggies, or tuna salad. Or a soup with beans, or a lentil salad.
Fish is easy to cook but also easy to overcook. We eat a lot of halibut (in season), salmon, and cod.