The internet is full of stuff of interest to guitarists - information, guidance, tuition, discussion.....
I haven't included links to any of my favourite artists as there are so many of them, and by inadvertently leaving them out I'd probably upset some of the ones I know.....but here are some websites of organisations, groups and individuals from the world of acoustic guitar that I can personally recommend.
Superb hand made guitars and other acoustic instruments by Roger Bucknall and his team.
Probably the most famous, and revered, maker of steel string acoustic guitars in the USA.
Lovely guitars made in lovely surroundings - an old barn in rural Devon.
Authentic 1930s style resonators at affordable prices.
Beautifully made resophonic instruments from San Luis Obispo, California.
Guitar setup and repair
Internet Guitar Discussion Groups