Hi mum
It can be quite daunting when one first comes into the room but do try to come again with someone you know or if on your own you recognize some one from this thread , do stay as they or I will help you ease into conversation. If you don't recognise anyone, just briefly explain your concerns and someone will help. Another option ( and I don't know where your from ) is to find a time that is quieter and the room has only a few people in. This may not be as easy to do as it sounds but someone form your area may know when quieter times are. Whatever you will be comfortable with.
For those that are concerned about their typing speed, you will be amazed at how fast you pick up the pace. Alternatively for starters, small statements, comments etc, should suffice. Everyone works at there own pace.
Regards
lil