Subielue

Hello everyone, I’m new to this so bare with me. Just got a new 2018 subie Crosstrek and I’m already hooked. I’m interested in customizing it to make it a bit faster and use it off road, any one have suggestions on what’s a good place to start? Websites to look at? I just have so many questions and don’t know where to start. Can I add more horse power to the car? And still be able to go off-roading with it? Or is it either speed or off-road one can’t have both? Hope to hear from you guys soon, thank you.