Hello everyone New to Linux, new to self hosting, and struggling a bit but making progress.

I have two questions: 1 Is there a YouTube channel or a website with tutorials and explanations for the dummies like me? Something eli5 with easy words to start with and understand the basics.

2 I see a lot about nginx and reverse proxy and not sure I need it. I want to run a couple apps on my local network to be able to access it on any computer inside the house and, for now, nowhere else. Do I need nginx? What about port security? I’m worried my lack of understanding regarding ports would make my home network vulnerable. But since for now I only use 192.168.1 , i’d say I’m safe from intruders?

I acknowledge it’s all surely basic but I’m not sure where to find a comprehensive source of learning instead of googling bits and pieces.

Thanks