I do as you say - I pray to God and offer to carry the emotional and spiritual burdens of others as He would see fit. As for myself, God has accepted my offer. He is gentle - He starts slow and allows you to ease into it. My nights are increasingly difficult, my days are increasingly burdensome. I ask God to expand my capacity to carry more burdens, and I offer that back to Him to all Him to give me more to carry. I encourage this activity. I don’t know if this is the right way to put it, but I feel like it has given me the slightest taste of the cross. When I EM - the experience is intense. For me, Mass is intense with the sacrifice of Jesus made present.
After reading about St. Pio, I became inspired to do this. St. Pio prayed to Jesus saying that he wanted “to carry the suffering of the world.”

St. Pio said that he just didn’t know how to do it. Then, he received the stigmata.
Basically, some people offer themselves to be “victim souls.” I’ve taken a small step in that direction. In one case, I have met a person affected by my offering. It was at the beginning of my offering to God several years ago, and I was not as generic with my offering. It would take quite a while to explain all of it, but all I can say is that God is huge and can do anything.
Some people are called to do this, and some are not. You can discern this for yourself.