You Can Adjust Slowly and Happily
As a retiree going to live abroad, you'll find it easier to adjust to a new place and culture if you have the basic personality traits of emotional maturity, self-reliance, flexibility and confidence. And you'll adapt quicker if you start to learn the language as soon as possible even if at first you have to gesticulate to be understood. You really don't have to write it, just speak it so that you can get along. In most Latin countries much is said with gestures and hand and arm movements. In a short time you'll be approaching locals with ease and developing a network of friends.
In your plans of retirement you probably have often asked yourself what you will do with your time there. Fear of boredom has always been uppermost in the minds of many of those about to retire. They don't want to just sit around, but spend their days doing something useful which will make them feel satisfied. Self-expression is uppermost in the minds of many.
Many would also like to make a little money on the side perhaps with a small part-time production or service business of their own for fun and profit. Others would prefer to volunteer at local social service agencies, take their hobbies seriously and travel the globe. In the latter case, you would use Costa Rica as your base from which to travel as many expatriate retirees are currently doing.
For your own mental well-being and satisfaction consider your retirement as a transition -- a new phase in your life. Not the end of the road. If you haven't done so already, consider that you'll be terminating your job but you'll be moving on to another one of your liking or another career. This new phase in your life will enable you to take better control of your time.