Find a step-by-step guide on youtube!! Helps make the process feel more manageable. I reccomend Biblaridion’s “How to make a Language” series: https://youtu.be/FHK1gO2Mh68?si=wnZxi-gWxf5u7aMy.
David Peterson’s “The art of Language Invention” is a great book, available in most libraries, too.