Hi there,
I feel extremely enthusiastic about contributing to reactos through gsoc. I looked into the idea list for 2017 and "Audio Mixer" looks the most interesting to me. But I have absolutely no experience writing windows services, let alone kernel streaming. I have experience with linux internals and I have used Windows APIs in the past. I am really interested in this. How do I get a mental map of what all things I need to do to achieve this? What all stuff do I learn for this and how? 
Also suggest me if I should drop this entirely and conribute through coding something less "ambitious".