You could try this one

I haven’t found a site that’s really accurate. There’s too much variability from house-to-house.

Plus, if you truly “have no idea what we are doing,” then any time estimate (which will be based on a professional who knows what they are doing) will be wrong for you.

My wife and I (who didn’t know what we were doing when we bought our house 15 years ago), jokingly refer to the “x10 rule.” We’ve found that any household project we take on generally takes 10 times longer than we think it will.
Seriously, if you don’t have enough money to pay someone else to do the projects, I’d suggest ….

1. Take you list of projects to your local (non “big box”) hardware store.

2. Ask the clerks (who usually know a lot) for approximate prices/time frame. They can probably give you a reasonable guesstimate.

Good luck!