A warm welcome to PF.
Post your question in the proper section, and members here shall readily help you out. For Homework questions, don't forget to fill the template.
In order to help you start, the following are the three main sections in PF. You should explore them well:
1. The main forums, that you see in the first page.
2. Insights Blog, available at the top row (header section). In short, they have been described as a "wonder of the web". It contains articles that help in learning topics to a great extent.
3. The Videos, also available in the header section. The media gallery now has some great videos in almost every aspect in science, and they provide an audio-visual learning experience.
By the way, you have a scary profile picture.
Enjoy your time here.
With regards,
Wrichik.