You ask an excellent question! I was hesitant to ask that kind of question here. But it is true that there is no charter that prohibits us from asking any other question than the one devoted to pure CAO. By the way, I would like to call out the Lynkoa team on the subject!
Brief! To answer your question, I'm also embarking on the wonderful world of business creation. I have already been to see an insurer (MAAF), they strongly advised me to take out professional liability insurance. For the price.... less than 60€/year! So no worries about that. Then you can also take out a "professional consequence" insurance: imagine that you hurt others following the design of a product that turns out to be defective... or even worse than injuring... Your customers will be merciless! Except that the catch... little assurance does... and at high prices! I keep looking...
Do not hesitate to contact me in minutes if necessary.
For my part, I opted for Alianz which between the price and the services was very interesting. but all this depends on the APE code. Some insurance provides a ten-year guarantee where there is no need for it.... apart from CAD building maybe....
Back from my insurer MAAF: it offers a professional liability insurance at 85€/year. This includes ONLY civil liability and not "professional consequences" due to a design defect for example. MAAF does not offer this type of insurance. For my part, starting the activity on my own I don't think I'll insure myself for that the first year. I'm taking the risk. I would specify in my general terms and conditions of service a mention of non-liability.