Guitar chords are most often learned from a book of 'tab' chord diagrams. Given that most popular tunes are only in three or four keys and only use a few chords, you don't need to remember that many to have a fair repertiore. Aside from that, it depends greatly on what style of music you want to learn. There are tutor books and videos done for all styles and your ability to read music, along with the theory knowledge you will hav e from that, should give you a head start.
Saxophone isn't too difficult - and it is possible by following the 'Tune a Day' course of books. The embuoche is like Clarinet and not too difficult once someone has shown you how, whereas the fingering is similar to Flute - an advancement of that you'll be familiar with from recorder.
I would suggest you immerse yourself in as greater variety of music as possible and decide what you really WANT to play - then just 'go for it'. I did.