Keep up the effort and focus!! It's really fun and rewarding to see improvements in performance which leads to even more improvement.
Just be ready for those days when things take a step back from what you'd hoped. It's just a part of the fickleness of this cycling stuff and your body telling you you're not as super as you think you are!!!
I have some cycling buds that are 55+ that are doing personal records in various events plus holding their own against the much younger guys. The only way to determine what your potential truly is, is to do exactly what you're doing.
Keep us posted on your ups and downs!!