You may get one. However it will be for 3 months at a time. You MUST attend the course and report to immigration to renew every 3 months. Your progress will be monitored and you will NOT be allowed to use it just to stay in Thailand. But it is very unlikely you will get an Ed visa.
To get it on the market inAugust you need to be engaging with an estate agent in May. Advertising, pictures . Then you got viewing and offers to get through . Then contract of sale with queries bouncing back and forth via each parties solicitors, once agreed then sign and exchange . Then final queries before completing. Probably contract terms agreed by October and up to 2 months to complete. Expect at least a 15% drop from todays value for a successful sale.
Yes from your embassy. If divorced you must present your divorce certificate and if your former partner has passed away they probably need a copy of the death certificate.