My advice from experience is to do whatever feels right at the pace that feels right. If you wanna dive right in, dive. If you prefer to take things one step at a time and experiment as you go, that works, too. Even small changes head you in the right direction. You came to the right place: a lot of different ideas on here to choose from. Start with what tastes good to you because it's going to take a little while to train your tastebuds. But once you do, you won't believe how much more flavor everything has. Before I went vegetarian, then vegan and raw vegan, an orange was just an orange. Now, it's so sweet, it's like a freakin' piece of candy! It rocks!
Regarding protein, it's hard to beat legumes for sheer percentage by weight. Lentils are among the highest in protein out there and they can be cooked in such a way that they taste robust and "meaty." Plus, they freeze well so you can make a whole trough of them and put part away for later. Finally, they're inexpensive--one of their finest qualities. I recommend following your friend Google to some lentil burger recipes and playing around with sandwiches that are portable. If you need something to mix into smoothies, raw hemp protein powder has a very balanced protein and amino acid ratio naturally. And leucine has been proven to be the best amino acid for post-workout recovery, so adding a dash of spirulina to that smoothie will help. http://nutritiondata.self.com/foods-011 ... axCount=15
Have fun. If it's fun, you'll wanna do it again tomorrow.