Beginner help.

ok so I just started using www.remarpro.com. I’ve been using wordpress.com for a while now and know how to do everything on that so a little knowledge has transfered over but other than that I am clueless. I know nothing about code or what ever and have no idea to change headers and everything else that goes along with that. I realize there are probably hundreds f posts just like this so I’m asking if you can point me in the right direction to learn how it all works? I learn well by watching video but anything works!! Thanks!

This is the site I want to work on. I’m changing the themes a lot so don’t really get to specific with one theme.

leoahrens.com.previewdns.com

Thanks!
-Leo