Border crossings are still closed for foreigners.
You can do crossings to Laos, Cambodia and Malaysia. Where you go to depends upon where you are staying.
You cannot get a VOA unless you are from one of the 18 countries that qualify for it. You will get a 45 day visa exempt entry that can be extended for 30 days.
That depends upon where you are staying. The crossings to Cambodia are also good. Bother offer visas on arrival for entry.