For me it wasn't difficult. Before I was baptized I was encouraged to just give God praise and thanks when I came out of the water, and if I started speaking words I didn't understand it was a sign i had recieved the Holy Spirit. So after I came out of the water I gave God praise and thanks, and a few seconds later my lips started fluttering and I started saying things I didn't understand. I really had no idea what was going on since I was taught nothing about baptism, Holy Ghost infilling, or tongues. I had gone to a UPC church on a Sunday morning, came back on Sunday night( how I ended up going to a UPC church at all is another story), someone else was getting baptized that night and the pastor asked if anyone else wanted to be baptized, and I just felt real strongly that it was the right thing to do. The thing is I was 40 when this happened and was so sick of the way I was that I was willing to do anything to change, even give God a chance. That was Sep.8,2002.
I'm really glad I didn't have to wait to recieve HG and go through the "ordeal" of being pushed around and being shouted at in my ear, etc, cause I probably would have punched someone in the nose. I was quite different before I recieved HG.