Thr provided link by other forum members are useful for newbies like you  and don't forget to always use the search feature of this forum and if it didn't help much then use google for example and make sure to add Bitcointalk at the end of what you have searched. Anyway, welcome to Bitcointalk forum and I hope you enjoy your time here in the forum. You should check the Beginners & Help Encyclopedia by Ratimov because it contains a lot of threads that you can learn.

Welcome to the Bitcointalk forum. Look at how the seniors welcome you, you can feel the friendliness of the seniors when they direct you to several threads that can open your insight while you are here. You can ask anything here as long as it's related to forum rules/regulations and something related to Bitcoin, every answer given by the seniors will be useful and can increase your insight. Start by reading all the topics that have been recommended for you, then you can continue the discussion here if there is anything you have never known before.