To create your own font, you can use two free applications. Figma the program, where you will design and export vector graphic as SVG and the program which will put all SVG into a fully featured font.
Applications:
Figma – free online app [or commercial software such as Adobe Illustrator]
FontForge – open source
Finding the right Encoding
If you wonder which encoding to choice. Read more about ISO Common character encodings standards at wiki/Character_encoding