Like all the others it is never too early especially since certain types of venues fill up faster then others. I was contacting venues and being laughed at because I was just starting my search 18 months. They told me they fill up 24-18 months out and that unless I was ready to book now I should reconsider my wedding month.
No two weddings will alike so no two times lines will be alike either. If your ready to start making decisions I would say start planning now that way you are sure to get the venue and vendors of your dreams!
Also there are a ton of checklists out there that break the wedding planning process down into months. This was super helpful for me because it helped prioritize what I should get done first and what could wait.
Go ahead and get started! 2022 weddings are going to be high demand because of Covid. Our wedding is July 28th and We have out venue and catering booked and narrowing down photographers and videographers now.