There are some things I would suggest you consider about your request:
Firstly, you are asking on an open forum online. The Internet is full of scammers, who will claim to be there for whatever you need, and follow up with demands for money, threats, and other means of intimidation. Be very, very careful.
Secondly, if you find an online mentor, you're still doing exactly what you'll be doing here: reading posts. Except with a mentor, you are restricting yourself to the views of that one person, the tradition they follow, and their interpretation of things.
Thirdly, you gave no information of any tradition you are interested in, your personal beliefs spiritually, or any other information which might help potential mentors decide whether they are a good fit for you. I don't mean personal information, but a general ballpark of age, and what part of the world you live in can go a long way in itself, as a lot of people are not willing to teach minors (and that can even be illegal in some areas), and if they are willing, it can be very difficult if you are so apart in time that neither of you happens to be online at the same time.
Fourthly, you have no way to vet your potential mentor. I am an anonymous stranger, who can claim any accolades I choose to. You're very new at magic, so you may not be able to see through whichever load of tripe I throw your way. It's the same with anyone else: Their posts and advice hold no meaning outside of their content. There are some members here I would absolutely trust, and some members I simply do not know well enough to believe some claims. Please be incredibly careful in this regard.
All of that said, it may be easier for you to find a teacher or mentor local to yourself. Your best three options, in my opinion, are visiting local occult shops, or the web sites witchvox and meetup.
As always, use extreme caution when meeting people from the Internet.
I personally recommend that you start with the basics, such as meditation, grounding, centering, and visualization. The more you familiarize yourself with these topics, the better off you'll be later on down the road.
Some people never choose a specific path, but rather decide to be "eclectic", which is what I am. Meaning that I pull from various paths. For example, I use crystals, which is typically seen as nature magic; I do candle magic which is representational; sympathetic magic such as poppets, which if I were a full on wiccan wouldn't really go together, even though I typically abide by the wiccan rede, despite following the Greek pantheon.
It's all about doing your research, and finding what speaks to you personally, and what is right for you. What you believe may not be the same as the person right next to you, but that doesn't make you or the other person any more correct than the other.
Read through the articles and see if anything appeals to you. Even joining a coven may be a good idea, or just simply browsing the coven pages just to get ideas.
Now, I must warn you, you may come across people claiming to do the impossible, which you should be wary of, as magic doesn't break the laws of physics or change your DNA.
That is some good advice. I would always recommend to do some reading and research, and to find an in-person group with whom to study. If you decide later on to change to a different tradition, you will still have a solid foundation, and some social connections to potentially other groups.