Interesting replies, all. I agree that you (Navek) should have no trouble with the physical part of it. You can probably do the first day easily, but may be sore the next, That's okay, it will get easier fast.

What hasn't been discussed is the psychological effort it may take. Depending on the roads and elevation changes and traffic conditions, it may be more stressful than you are used to. After all, cars are deceptive in that they seem safe and controlled. They provide a controlled environment inside, dry, and warm or cool as required, with radio for distraction, etc. A bike offers a very different experience.

Every day you will have to answer the question "Drive or ride the bike?" Eventually you will look forward to the bike, but perhaps not at first. After you have been doing it for a while the novelty may wear off and you will be thinking the bike ride is boring. Then the same temptation will arise - to take the easy way out. If you are all-in, you'll keep riding!