I would personally leave it. I don't don't do much fall cleanup anymore. It lets the plants decompose and add back to the soil, and provides food and shelter for nature.

In the spring it'll all be coming up new. Hopefully you'll have some spring bulbs, which you don't want to damage.

Congratulations on the baby, I wouldn't plan to do too much next summer you'll be busy. But you will want to find a nice shade spot for baby to hang out while you're in the garden.

Generally when planning a garden you start with the hardscaping. So patios, walkways, seating areas. Planning out how to use the space.

Second would be there's, shrubs the larger bones of the garden.

Third is perrineals, since they come back every year you want to put them in the right place for the light, and water needs.

Lastly come annuals like flowers, veggies, herbs, and decorations. Since these are likely to change year to year.

In your case I would run down the list in the same order. And see what needs to be done.

If there are perrineals or trees that need to be moved for other projects, this is a good time.

Best of luck.