Do I just check every hour or so to see where the sun is at that point? I’m assuming it would be best to wait until March/April when the days are longer?
I would start looking for this information the beginning of April. Put a stone or a stick or some kind of marker where you will plant each berry bush (or whatever). Something big enough that you can see it from a few yards away.
You need a sunny day for this experiment. Walk by early in the morning, whenever the sun starts shining on that area. Take a picture with your phone, facing the planting bed. Go back in two hours or so, take another picture. Go out around noon, 2pm (ish), and late afternoon.
Look at the pictures. That will tell where the shadows will fall, and if one part gets more sun than another, like my garden. As the season progresses toward the solstice, you'll get more hours of sunlight.
The best orientation of a planting bed is east to west. That lets the most sunlight shine on the row of plants, since the sun is to the south (here in the Northern Hemisphere).
If you're working around something immoveable, like a shed, tree, or you're in a valley, you might want to take pictures more often, say every hour.
There is an apple tree that shades part of my garden in the early morning. In the spring when there's frost on the ground, that area thaws more slowly. That means that in the early part of the planting season (before tomatoes, for sure), greens planted where that shade falls will get about an hour less sunshine. By the time I'm planting out the tomatoes in late May/early June, the sun is rising earlier, setting later, and is higher in the sky, and makes less of a difference to that particular spot.
Look for information for whatever you want to plant. Some plants need well drained soil, and if their roots end up sitting in soggy soil, the plant may not do well, or even die. Some plants need light, sandy soil, and other don't mind if you have heavy clay soil.
I have a garden of each.

Fortunately, the best amendment for both of those soils is the same thing: lots of organic matter. Sometimes the answer is easy.