Go ahead and kneel after communion just like your mother did. That is the norm. Standing after communion is an insidious deviation from the norm. I’ve only seen standing after communion when traveling in the more liberal areas and I have always refused to stand at that point. No one ever threw me out for it.
I also think all of us who are physically able should at a minimum genuflect prior to receiving and receive on the tongue. I admire those who have the courage (and good knees and balance) to kneel and receive on the tongue at all masses, regardless of the availability of a kneeler, an option that all Catholics are free to use and the Vatican has made clear that no priest or bishop may violate. Standing to receive and receiving on the tongue are both indults which could be withdrawn at any time Rome wakes up, while kneeling and receiving on the tongue are still the universal norm and cannot be denied to the communicant.
There are two churches in my area that installed Communion rails, and the priests distribute Communion the old way, with us kneeling at the Communion rail and the priest going from person to person distributing the host.