Know the problem, and been there so many moons ago. But, good for you in wanting more, and being curious about expanding your horizons.
With such a cash reserve, you are well within the price range to get a decent digital keyboard and not have to worry about a full, 88-key digital/electric piano manual.
And most any 61, and some 76-key layout keyboard decks are within your reach to discover not only basic piano introduction, but a variety of instrumental styles and accompaniment to enhance your playing experience while having any guitar at hand.
If the 'Fender' is treating you right for now, get the keyboard while you are still wanting to find out what you are capable of in the next few years. This is how long such a switch (and compliment) can involve during a new period of learning and find other pleasures with a keyboard to alternate with.
You have to go and try out not only that Yamaha model, but a few others as Casio, Kawai and Williams who offer up some good units as well.
Best at a music store or GC to have a better idea of what you will expect from anything you think will meet your present needs and learning ability. Never buy on line from any product sales provider, other than something you know about and have first experienced physically at a 'brick and mortar' outlet.
Once you know how to play and appreciate guitars, a guitar will always change (physically) over the years but still a guitar. And, having to have another instrument as versatile and complimentary standard for music as a piano, or keyboard, is but a welcome addition to the overall experience in the world of music appreciations and exploration.