Can a layperson dare to handle the baseboards themselves?

It would be interesting to know what cost savings you actually get from doing it yourself.
For my 200 sqm house, the craftsman’s labor time only cost 400 euros.

Surely this amount does not weigh much in the overall house construction. Nevertheless, it is €400.- and even Scrooge McDuck started small once.
I worked on and tinkered with our first house for years, and at the beginning I really had zero idea and no tools for it. Today I know that, from a calculation perspective, I have invested a lot of time, nerves, and bruised fingers for free, but in retrospect I wouldn’t want to miss any of it and today I can actually do quite a bit myself or rather can assess a situation because I have once physically experienced it completely.
However, I also understand that this is increasingly becoming uncommon these days, but I think that especially for tasks like molding and others you can learn how to handle tools without committing dangerous construction sins; worst case you buy a few meters extra. You’ll have a few tools in the house sooner or later anyway, so I also see this as a good opportunity to get familiar with them.
And as the Swabian says: “Having doesn’t come from giving.”

So we simply glued the baseboards. Using clips probably takes forever since a lot of holes have to be drilled. It’s not like you take them off every few months. And cables are likely to stay there for many years.

It’s quick. About 1 clip per meter. Holes are drilled quickly.

I also really like the thing with the corner turrets.

Does anyone have an idea for a "temporary solution" as an alternative to baseboards? We want to wait the obligatory half year (at least), but currently the edging of our living spaces looks really bad. The wallpapers are not all the same length, the paint doesn't reach the floor – it looks like the painter knew we still wanted to install baseboards. Overall, I don't want to live with the look for half a year. Is there any way to temporarily fix it without getting a moisture problem? With some kind of wallpaper border or some kind of sticky border or something similar, which can later be replaced by baseboards? I would just like a visually somewhat cleaner finish between wall and floor.

Do it and finish. Nobody waits. There are no problems.

I think the time has come, I want to tackle the baseboards this year.
I’m thinking more in terms of doing it myself, so we can proceed room by room. We have already moved in, and a craftsman would probably have to move the furniture faster than we can manage.

I tend to prefer MDF baseboards and the adhesive type. You probably don’t take them off that often, and if you do, it’s usually only when renovating.
Does anyone have experience with the corner blocks? I’ve heard several times that you constantly catch on them while mopping/vacuuming.

Alternatively, I considered buying a "bevel and cutting box," those cost about €30 and supposedly you can use it to take the angle from the wall and cut the baseboards to fit in this device, if I understand correctly.
But I’m a bit skeptical because not only does the angle have to be right, but also the length so that it fits together in the end. How do you calculate that best? Or am I overthinking it?