My advice is two fold:
1) check out the lessons section of this site
and
2) go to a record / music store and get a song book containing songs you A) like and B) know well enough to hum / whistle. Then sit down with the song book and learn the accompaniment to your favorite songs.

This is how I started 20+ years ago.

I am in the process of putting together 6 or so "total beginners lessons" which should be finished tomorrow so check the "lessons" section of this sight. I am also in the process of writing a lesson about DIY guitar set-up and my "Build your own Project studio" should satisfy the most ravenous appetite to tech stuff !