Since you have experience welding, you shouldn't have any problem adjusting to TIG (except now there will be a lack of spatter and your cloths will look cleaner.)
There are a couple of videos on the Internet that are pretty good in getting you started. The best I've seen for clarity is HTP's one on TIG. Covell makes a decent one as well. The HTP one has some of the clearest picture of the puddle you'll find anywhere.
You'll find the biggest challange is typically not the torch but feeding the filler. Not to worry, there are videos on techniques for that as well. Youtube.
The Miller packet is a good one, but Lincoln also has TIG welding packet. ESAB as well,but I would say ESAB is more like a power point presentation. Not sure were I got mine from Lincoln, I think my LWS gave it to me 15 years ago or so. The documentation you get from Lincoln and Miller are as good as any other written source. No need to look further.