The insurance is useless. What you’ll collect in claims is little more than self insurance. If you can keep insurance from your home country, annual travel insurance, and accident insurance if they will sell it to you, its better. Get Non O visa
The tourist sim is a fair deal. Get one with plenty of data. Wifi here is extremely inconvenient to use. Kicks you out if you font make a keystroke for a moment, wont save logon info so you have to reentry passport number etc. Hotel wifi often useless too, so you want to tether your laptop. I did get 70 gb good for 1 year from AIS for my extra phone, but its slow.