I am confident that the Thai police know and understand the laws relating to licences from ASEAN countries which are totally different to the laws for licences from Western countries.
There are no valid international drivers licences although you can obtain an illegal one from the internet. Perhaps you mean an Intrnational Drivers Permit (IDP) but then you would still be wrong. The poster has a valid licence from the Philippines which is part of ASIAN and as such is valid in all ASIAN countries including Thailand and does not need to be accompanied by an IDP.
To renew for a second/subsequent year, Immigration may want to test that your Thai has improved to an acceptable standard. Get a one year Thai education visa and then try a different type of educaction visa.
There is a wonderful Thai lady ojn the staff at Bangkok Bank in Doi Saket. She has willingly assisted many Westerners to obtain a bank account. You will need yopur passport, letter of residence, deposit of 100,000 thb and it will assist if you are accompanied by an account holder of the branch.
Best to get your retirement visa before you arrive. If you arrive without a long term visa, it will be almost impossible to open a Thai bank account to deposit your 800,000 thb which is a requirement to obtin the visa in counrty.
If you get the 60 day visa exempt stamp and extend by a further 30 days at the Immigration office, Immigration class you as a tourist. If you then attempt to enter again on a visa exempt stamp, Immigration rightly consider that after on 90 day stay in the country that you are no longer a tourist but that you are attempting to live long term in the country. While there is no legal limit to the number of Visa exempt entries, once the Immigration officer believes that you are no longer visiting the country as a tourist he will deny you entry. If you have already stayed for 90 days on a visa exempt entry, then in future to guarantee entry into Thailand, you need to obtain a long term visa suitable to the reason for your stay.