You might think you'll be eating 10 avocados a day and your only source of protein will be tofu. You couldn't be more wrong. When you eat a balanced plant based diet, you rarely have to worry about protein. Eating more plants will expand your horizons by eating a plethora of foods that you may have never heard of before. And if you're eating a variety of foods, avocadoes might be one of them but it's unrealistic and unhealthy to rely heavily on one type of food.
So you are still worried about protein. The meat industry has done a very good job to make you think you need a lot of it, but most people aren't educated in the world of nutrition. I am still learning. The best place to start is to find out how much protein you need to eat based on your weight. Multiply your weight in pounds by 0.36 to find the amount of protein you need in grams. Most likely, the number you get is a lot lower than you originally thought. I recommend that you do your own research, as I am not a registeed dietician. Most plants contain a tiny amount of protein, which adds up. Chia seeds, hemp seeds, pistachios, black beans, quinoa, and broccoli are my favorite protein sources.