It's not difficult. I installed our baseboards myself as well.
However, painted wood. The right angle rarely matched. The fastest way for me was to take the angle with a movable template and transfer it. I sawed with a miter saw, not by hand. Really tricky corner problems were easier by hand though. You need a long support surface so the miter cuts don’t slip away. Previously, I worked with MDF baseboards with separate corner connectors for a family member; I didn’t like the processing or the look, and it wasn’t faster overall. If you make a slot in the wooden baseboards, it’s easy to fill it with acrylic, not silicone, and paint over it; nobody notices. Where the wall sometimes receded backwards, I also had to fill with acrylic behind from a slot width that I found ugly; it doesn’t affect the appearance. I glued them with a fast construction adhesive; it was the first time I glued any. They are only glued on one side, not both, so they can accommodate movement. Once something changed again and I had to take some down. With normal paint, the paint adhered to the baseboard, but the lime paint had silicated with the substrate and pulled off some plaster. It wasn’t a problem.
Best regards Gabriele