@Marian3725
I would say yes, you do need your own insurance separate from Airbnb. Doing a quick search here regarding Aircover will emphasize that.
Other Hosts who rent portions of their Home (home share) can comment about what they do. Some companies allow you to add a rider to your homeowner's policy to cover home share situations and they are usually pretty reasonable. Be sure to read the fine print though and make sure the policy covers loss of income should you need to cancel reservations due to natural disasters (wildfire, tree falls on house, flooding). Proper is the most expensive in the Short Term Rental market, but has the best coverage. I have heard that Steadily is a possible option and more reasonable rates.
Listing Accuracy
If you are renting the basement walk-out only, then use caution as your listing says "entire home." Guests can ask for a refund from Airbnb as they may feel they are booking an entire home (upstairs and downstairs) and do not expect the Host to be living upstairs. Guests will want to know if someone is living above them and you'll need to disclose that on the listing and in the Guest Safety section under "potential for noise". Most Hosts list these type of properties as "Guest Suite" or "Apartment" as there are shared spaces, even if it is just the driveway. Looks like a large space, so I suggest you include the sq footage in the description and mention it is a ground floor walkout to avoid possible issues.
Amenities Missing?
Suggest you go through the entire amenities list as many important amenities are showing as "not included" although I can see from your pictures they are probably available: