SVG Graphics are great in general because they are both dynamic and also very small. This means you can have a large image "visually" yet the actual size in bytes will be quite small. Much smaller than any other image type. Also, as they are vector based, you can increase the size visually and you won't get that "stretched" and "pixelated" look and feel.
Some of the key accessibility standards you should be aware of as you start your accessibility journey.
.Gov site with great resources regarding color and accessibility
These tools help with understanding problems with color blindness and contrast and preventing these problems with your content.
Screen Reader Options and Tips
Designing For Accessibility And Inclusion
The more inclusive you are to the needs of your users, the more accessible your design is. Let’s take a closer look at the different lenses of accessibility through which you can refine your designs.