Congratulations on building up your concentration practice. You mention working with a meditation leader. Joining a sangha, participating in retreats, and working with a teacher are ways of establishing a relationship with a meditation leader, and are all helpful when you have got to that level. All of these things can be done remotely. In fact, video chat is now the default mode for working with pragmatic meditation teachers. I meet my teacher over Zoom, and we live in the same city! In North America, I would guess that more than half of retreats now offer remote participation, and there are lots that only happen virtually.
If you know what kind of teacher/retreat/sangha you are looking for (concentration-oriented, mindfulness-oriented, etc.) you can ask for suggestions here. Teachers typically cost money if you are able to pay, and usually have a sliding scale or free option if you are not. The same is true of retreats and, to some extent, sanghas, as there is often a request for donations.
Are you specifically looking for support in doing 3 hours a day of kasina practice?
