On my Christian gap year program, we were set into peer-mentoring groups (same gender, groups of 3 or 4).
As it happens, every single one of us was uncomfortable praying out loud. It was the only thing we could bond over as a group, lol. So while other groups all had at least one person who didn't hesitate to pray out loud for the group, it took us until the last two months or so to pray for each other.
I wanted to "gain this skill" not because I felt like less of a Christian keeping my prayers personal and quiet, but because at times I felt very blessed by others when someone prayed over me. I wanted to be able to execute that skill in times where others would benefit from me doing that for them.
It took some time, and it took some guts, but now I'm comfortable enough to do it in situations that are called for. It's sort of like public speaking in that I'm not totally comfortable doing it, but that doesn't mean I won't do it. I want to do it, and I can when I need to.