Do I have to change the amount of calories I eat and amount of protein?

[Eat2Live23]

I'm going vegan after seeing, hearing about, and reasearching the countless benefits, over a long period of time and I want this. I want to become vegan. Something to consider is that I weightlift and take it kind of seriously. I try to take about 3000-3300 calories a day and 150 grams of protein. I drink whey protein shakes pretty frequently. I need a substitute for that and a diet that is packed with calories. Is this even possible? Do I have to change the amount of calories I eat and amount of protein? I'm brand new here so any feedback would be much appreciated, thank you!

[Risker]

Try this website http://www.veganbodybuilding.com/