1. First off: Am I too old to learn?

No! And let’s get one thing straight: You’ll never be too old. This is an all-too-common concern among new players, whether in their teens or well into their 50s. There’s no age restriction on learning a new skill. No matter when you start, playing an instrument of any kind is a rewarding and worthwhile experience that enhances self-discipline, creativity, coordination and confidence. It may be true that younger players can absorb the material very quickly. However, adults are more likely to practice consistently, since they often possess the motivation and attention that younger players lack. So scrub that doubt from your list right away!

https://www.fender.com/articles/how-to/for-those-about-to-rock-10-beginner-faqs