To do list?

Does anyone have a month by month to do list that I should be completing? I'm 20 weeks tomorrow and haven't done much of anything in terms of prep- and this is baby #1. Now that it's the new year, I feel like I should be doing and prepping more! We aren't able to have a baby shower since we don't live close to anyone we are close with, so are guessing we will have to buy most stuff ourselves.

I mostly just feel like if I did little by little every month, it would be less overwhelming? Any advice welcome, or if anyone has a comprehensive to do list to share, that would be great! I'm usually a good planner, but this is all very new to me :)