As someone who has worked with kiruv organizations (several of them) for more than two decades, including with youth, I find the OP to be of questionable capacity when it comes to kiruv.
Shmiras Mitzvos is not all or nothing. That was one of Rav Noach Weinberg zt’l’s clearest directives to all those he taught.
90% of the kiruv professionals and experienced lay people would agree with the following continuum as to how to prioritize how you introduce someone new to observance to mitzvos.
Ahavas H’
Ahavas Yisroel
Limud Torah
Emuna
Shabbos and Yom Tov
Kashrus
Tfiloh, tfillin
More mitzvos as they can be included based on life cycle, community, and opportunity
Not laying on your back isn’t even in the wheelhouse. I think if this issue is so important to you it might be better to advocate to FFB chareidi kids who will understand the context than to these BT kids. You don’t seem to get it.