i think I've done too much too fast

Yes you are overthinking it! :-)

I am also a 2022 wedding - February, so a bit earlier than you.

I have booked the venue and evening food, and am about to book the caterer and DJ. Still have photographer, transport and florist to sort and I am already over it!

I am doing a lot of DIY stuff so that is keeping me busy and is the bit I enjoy, but I will be so happy when all the vendors are booked.

You can still enjoy sorting and sending your invites, chasing for RSVPs, doing the table plans etc. and you can make as much extra work (and spend as much extra money!) as you want - bridesmaid robes, favours, table decorations...

If you're interested enough (and not everyone is!) you will find things to do and enjoy. Otherwise, just feel smug knowing that you're so prepared!