You need to stay busy. I've been through very similar experiences, and I find myself in a cycle of detachment which leads to disinterestedness which leads to laziness, slothfulness, and lack of purpose. Then, to combat such things, I would willingly try to become interested in things like hobbies, which can easily lead to attachment to worldly things, then the cycle would repeat. One could spend much time in prayer, but as for me, I had a hard time staying focused for very long, and there is more to life than just verbal or mental prayer. There is action, which if done properly, is also a prayer.
I think you have an advantage that makes achieving perfection much easier, but yes there is a problem if you are not spending much time and effort on serving God. It seems you know and love Him already. Go serve Him. If you need an interest, consider how few make it to heaven, and what Jesus said about this topic. Be you perfect as your father in heaven is perfect. Make your goal in life to be perfect in every little (or big) thing: in prayer, in work, in every word and thought. It starts with the little stuff. Go into the world and help others, whether for free, or for pay. If you don't care about money, let them pay whatever they will, but be a good example to others as you work towards perfection. Perhaps the virtue others see in you will lead them to the faith and salvation. Maybe become a Brother or a similar "Familiar" living with and serving the clergy at a local priory.
"I don't earn much but already live a very comfortable life with nothing I can complain about." I think this should concern you, especially these days, though Catholic virtue could allow one to still consider themselves comfortable enough to not complain even while enduring daily trials and sufferings.
As for me, I am working for a local christian business owner, hopefully he will convert. I don't work every day, but the days I do work, it gives me beneficial human interaction, various trials and other ways I can use to work on my perfection, and it gives me motivation and the habit of doing things and keeping busy, so on the days I don't work, I can better focus on prayer, study, meditation, and making productive use of my time at home or wherever.
I just found this book I'm going to get, though I have already come to the realization of how few are saved. It is a really motivating topic. https://www.traditionalcatholicpublishing.com/on-the-fewness-of-the-saved.html