If you want someone to tutor/ mentor you, you need to lay out a clear direction of what you want from that tutor and were you see yourself going with your art. They also need to know where you're at, so showing any sort of work you've done period is necessary.
Do you intend to just draw for hobby? Have you even drawn at all yet? Have you started any comics? Do you intend to make a comic? What sort of art styles do you like and which ones do you think you'd like to achieve? Answering these questions will help you find the right person, as well as guide you towards online learning resources.
My general advice is when looking for help online, take everything with a grain of salt. No artist is perfect and sometimes tutorials can actually give very backwards advice. Take knowledge from as many sources as possible to avoid learning bad habits and also broaden your inspiration circles as much as possible. Look at artists who draw outside of styles you normally find yourself attracted to, there's a lot you can learn from them, especially when it comes to developing something unique to yourself.
Avoid the Dragoart website (it's all just traced with incredibly unhelpful step by steps that don't understand what they're doing) and anything written by Christopher Hart. He's a charlatan who is just cashing in on the manga craze, the artworks in his later books aren't even drawn by himself, as much as he'd love to give you that impression. He's a meme among the art world for a reason.
