how to add RSS – still don't get it

I’m trying to install RSS feeds on my site and have and can’t figure it out.
I’ve read a lot of posts on the subject and spent a lot of time, but they just get more and more confusing because it seems every post says something different.

Many people want some kind of customization. I just want a basic feed with (I guess, feed buttons). Despite what I’ve read here, many people on the web still don’t know what RSS is, so I think buttons are a good thing.

I would think RSS is such a common thing in WordPress, it should be simple to add the feed links without going into php files.

I’m very web savy and understand html, but have a very limited knowledge of php (although I have modified my theme by going into php templates and figured it out).

Here’s my site:
https://www.thewebsitewarrior.com

Can anyone explain how to get feed buttons for all the different feeds?
P.S. My widget section has a widget for RSS but when I drag it to the sidbar, it asks for a URL. What is the URL to the feed? Can I put mulitple URL’s to muliple feed types?

Please help.
Thank you.
Tony