I'm newbie member so I don't have good info about minig so if you are pro in this process can you help me with some guides and tips.
For now, mining bitcoin is not profitable anymore because of it's price that is too low that's why miners stop on mining bitcoin based on what I've read on the articles about bitcoin mining. It's not worth it to mine right now. You will just gonna waste your time and energy on doing it. About your second question, ASIC is a computer hardware that is used in mining bitcoin, basically it can be use not only in one purpose. When you have two ASICs you can mine bitcoin and litecoin at the same time.