Hello there, I am a self-learner in maths and electronics. I can't really provide so much knowledge, but satisfying my curiosities is the best feeling ever!
Just to make sure we can help you as much as possible, make sure you know about the three main sections in PF:
1. The main forums, that you see in the first page.
2. Insights Blog, available at the top row (header section). 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.
I assure you that you will have a great time here.